component
TL494IMT
Public Made by Adomby adom
HGSEMI AC-DC Controllers And Regulators, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TL494IMT
HGSEMI · AC-DC Controllers And Regulators · TSSOP-16
TL494IMT from HGSEMI, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | INPP | input | Non-inverting input of error amplifier 1; input voltage range is -0.3 V to Vcc-2.0 V (common-mode range VICR). |
| 2 | INNP | input | Inverting input of error amplifier 1; input voltage range is -0.3 V to Vcc-2.0 V. |
| 3 | INfc | input | PWM feedback comparison input; feedback current Ifb is rated at 0.3 mA maximum. |
| 4 | DTC | input | Dead-time control input; input bias current is -2.0 to -10 (printed as 'A', presumed µA) over Vin = 0 V to 5.25 V. |
| 5 | CT | passive | Oscillator frequency timing capacitor; recommended range is 0.00047 to 10 (printed as 'F', presumed µF) with 0.001 typical. |
| 6 | RT | passive | Oscillator frequency timing resistor; recommended range is 1.8 to 500 kΩ with 30 kΩ typical. |
| 7 | GND | power_in | Ground reference for the controller. |
| 8 | C1 | output | Collector of output transistor 1; collector voltage limit is 40 V and collector current limit is 200 mA per transistor. |
| 9 | E1 | output | Emitter of output transistor 1; each output transistor is rated for 200 mA maximum collector current. |
| 10 | E2 | output | Emitter of output transistor 2; each output transistor is rated for 200 mA maximum collector current. |
| 11 | C2 | output | Collector of output transistor 2; collector voltage limit is 40 V and collector current limit is 200 mA per transistor. |
| 12 | Vcc | power_in | Supply voltage; recommended range is 7.0 V to 40 V with 15 V typical. |
| 13 | OUTcon | input | Output control pin selecting single-ended or push-pull output operation; OUTcon current is 0.2 to 3.5 mA at Voc = Vref. |
| 14 | Vref | power_out | 5 V reference output (4.75 V to 5.25 V); reference load current is 10 mA maximum. |
| 15 | INPP | input | Inverting input of error amplifier 2 per the function column; the printed symbol is INPP, which conflicts with pin 1's symbol. |
| 16 | INNP | input | Non-inverting input of error amplifier 2 per the function column; the printed symbol is INNP, which conflicts with pin 2's symbol. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TSSOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (absolute maximum) | Vcc | 7 | 40 | V | 3 | ||
| Collector output voltage (absolute maximum) | Vc1;Vc2 | 40 | V | 3 | |||
| Collector output current, single transistor (absolute maximum) | Ic1;Ic2 | 200 | mA | 3 | |||
| Amplifier input voltage (absolute maximum) | Vin | -0.3 | V | Printed max is Vcc-2.0 | 3 | ||
| Power dissipation | PD | 500 | mW | Tamb45℃ | 3 | ||
| Operating ambient temperature, TL494I grade | Tamb | -40 | 85 | ℃ | TL494I | 3 | |
| Storage temperature | Tstg | -55 | 150 | ℃ | 3 | ||
| Lead temperature (soldering) | TLEAD | 260 | ℃ | soldering 10s | 3 | ||
| Supply voltage (recommended) | Vcc | 7 | 15 | 40 | V | 3 | |
| Collector output voltage (recommended) | Vc1;Vc2 | 30 | 40 | V | 3 | ||
| Collector output current, single transistor (recommended) | Ic1;Ic2 | 200 | mA | 3 | |||
| Amplifier input voltage (recommended) | Vin | -0.3 | V | Printed max is Vcc-2.0 | 3 | ||
| Feedback current | Ifb | 0.3 | mA | 3 | |||
| Reference output current | Iref | 10 | mA | 3 | |||
| Timing resistor | RT | 1.8 | 30 | 500 | k | 3 | |
| Timing capacitor | CT | 0.00047 | 0.001 | 10 | F | 3 | |
| Oscillator frequency | fosc | 1 | 40 | 200 | kHz | 3 | |
| Reference voltage | Vref | 4.75 | 5 | 5.25 | V | Io=1.0mA | 4 |
| Reference voltage temperature variation | Vref/T | 1.3 | 2.6 | % | Tamb from MIN to MAX | 4 | |
| Line regulation | Reg line | 2 | 25 | mV | Vcc=7.0V~40V | 4 | |
| Load regulation | Reg load | 2 | 15 | mV | Io=1.0mA~10mA | 4 | |
| Short-circuit output current | Isc | 32 | mA | Vref=0V, Tamb=25℃ | 4 | ||
| Collector leakage current | Ic(off) | 2 | 100 | A | Vcc=40V; Vce=40V | 4 | |
| Emitter leakage current | Ie(off) | -100 | A | Vcc=40V; Vc=40V; Ve=0V | 4 | ||
| Collector-emitter saturation voltage, common emitter | Vc(sat) | 1.1 | 1.3 | V | Ve=0V; Ic=200mA | 4 | |
| Saturation voltage, emitter follower | Ve(sat) | 1.5 | 2.5 | V | Vc=15V; Ie=-200mA | 4 | |
| Output control pin current | IOCH | 0.2 | 3.5 | mA | Voc=Vref | 4 | |
| Output voltage rise time, common emitter | Tr | 100 | 200 | ns | test fig 3 | 4 | |
| Output voltage rise time, emitter follower | Tr | 100 | 200 | ns | test fig 4 | 4 | |
| Output voltage fall time, common emitter | Tf | 25 | 100 | ns | test fig 3 | 4 | |
| Output voltage fall time, emitter follower | Tf | 40 | 100 | ns | test fig 4 | 4 | |
| Input offset voltage | Vio | 2 | 10 | mV | Vo(pin3)=2.5V | 4 | |
| Input offset current | Iio | 5 | 250 | nA | Vo(pin3)=2.5V | 4 | |
| Input bias current | IIB | 0.1 | 1 | A | Vo(pin3)=2.5V | 4 | |
| Input common-mode voltage range | VICR | -0.3 | V | Vcc=7.0V~40V; printed max is Vcc-2.0 | 4 | ||
| Open-loop voltage gain | GVOL | 70 | 95 | dB | Vo=0.5V~3.5V; RL=2.0k; Vo=3.0V | 4 | |
| Unity-gain bandwidth | fc | 800 | kHz | Vo=0.5V~3.5V; RL=2.0k | 4 | ||
| Common-mode rejection ratio | CMRR | 65 | 90 | dB | Vcc=40V | 4 | |
| Error amplifier output sink current | Io- | 0.3 | 0.7 | mA | Vo(pin3)=0.7V | 4 | |
| Error amplifier output source current | Io+ | -4 | -2 | mA | Vo(pin3)=3.5V | 4 | |
| PWM comparator input threshold voltage, zero duty cycle | VTH | 4 | 4.5 | V | zero duty cycle | 4 | |
| PWM input sink current | II- | 0.3 | 0.7 | mA | V(pin3)=0.7V | 4 | |
| Dead-time input bias current | IIB(DT) | -10 | -2 | A | Vin=0V~5.25V | 4 | |
| Maximum duty cycle, per output | DCmax | 45 | % | Vin=0V; RT=12k; CT=0.1F | 4 | ||
| Input threshold voltage (pin4), zero duty cycle | VTH | 3 | 3.3 | V | pin4, zero duty cycle | 4 | |
| Start control low current input | ISTL | -200 | -25 | A | V(pin3)=0.4V | 5 | |
| Start control high current input | ISTH | 25 | 200 | A | V(pin13)=2.4V | 5 | |
| Start control high current input | ISTH | 75 | A | V(pin13)=Vref | 5 | ||
| Standby supply current | Icc | 6 | 10 | mA | Vcc=15V; pin6 at Vref; other inputs and outputs open | 5 | |
| Standby supply current | Icc | 9 | 15 | mA | Vcc=40V; pin6 at Vref; other inputs and outputs open | 5 | |
| Average supply current | 7.5 | mA | Vcc=15V; RT=12k; CT=0.01F; V(pin14)=2.0V | 5 | |||
| Oscillator frequency | fosc | 10 | kHz | RT=12k; CT=0.01F | 5 | ||
| Standard frequency deviation | 3 | % | RT=30k; CT=0.001F | 5 | |||
| Frequency variation with voltage | fosc/V | 0.1 | % | Vcc=7.0V~40V | 5 | ||
| Frequency variation with temperature | fosc/T | 12 | % | RT=12k; CT=0.01F; Tamb=Tlow~Thigh | 5 |
CAD (KiCad official)
- Symbol:
TL494IMT - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
tl494imt-etched.step/tl494imt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl494imt.step/tl494imt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (12 pp, sha256
99e3d620b7c82bbd, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# TL494IMT
**HGSEMI** · AC-DC Controllers And Regulators · TSSOP-16
TL494IMT from HGSEMI, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | INPP | input | Non-inverting input of error amplifier 1; input voltage range is -0.3 V to Vcc-2.0 V (common-mode range VICR). |
| 2 | INNP | input | Inverting input of error amplifier 1; input voltage range is -0.3 V to Vcc-2.0 V. |
| 3 | INfc | input | PWM feedback comparison input; feedback current Ifb is rated at 0.3 mA maximum. |
| 4 | DTC | input | Dead-time control input; input bias current is -2.0 to -10 (printed as 'A', presumed µA) over Vin = 0 V to 5.25 V. |
| 5 | CT | passive | Oscillator frequency timing capacitor; recommended range is 0.00047 to 10 (printed as 'F', presumed µF) with 0.001 typical. |
| 6 | RT | passive | Oscillator frequency timing resistor; recommended range is 1.8 to 500 kΩ with 30 kΩ typical. |
| 7 | GND | power_in | Ground reference for the controller. |
| 8 | C1 | output | Collector of output transistor 1; collector voltage limit is 40 V and collector current limit is 200 mA per transistor. |
| 9 | E1 | output | Emitter of output transistor 1; each output transistor is rated for 200 mA maximum collector current. |
| 10 | E2 | output | Emitter of output transistor 2; each output transistor is rated for 200 mA maximum collector current. |
| 11 | C2 | output | Collector of output transistor 2; collector voltage limit is 40 V and collector current limit is 200 mA per transistor. |
| 12 | Vcc | power_in | Supply voltage; recommended range is 7.0 V to 40 V with 15 V typical. |
| 13 | OUTcon | input | Output control pin selecting single-ended or push-pull output operation; OUTcon current is 0.2 to 3.5 mA at Voc = Vref. |
| 14 | Vref | power_out | 5 V reference output (4.75 V to 5.25 V); reference load current is 10 mA maximum. |
| 15 | INPP | input | Inverting input of error amplifier 2 per the function column; the printed symbol is INPP, which conflicts with pin 1's symbol. |
| 16 | INNP | input | Non-inverting input of error amplifier 2 per the function column; the printed symbol is INNP, which conflicts with pin 2's symbol. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TSSOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (absolute maximum) | Vcc | 7 | | 40 | V | | 3 |
| Collector output voltage (absolute maximum) | Vc1;Vc2 | | | 40 | V | | 3 |
| Collector output current, single transistor (absolute maximum) | Ic1;Ic2 | | | 200 | mA | | 3 |
| Amplifier input voltage (absolute maximum) | Vin | -0.3 | | | V | Printed max is Vcc-2.0 | 3 |
| Power dissipation | PD | | | 500 | mW | Tamb45℃ | 3 |
| Operating ambient temperature, TL494I grade | Tamb | -40 | | 85 | ℃ | TL494I | 3 |
| Storage temperature | Tstg | -55 | | 150 | ℃ | | 3 |
| Lead temperature (soldering) | TLEAD | | | 260 | ℃ | soldering 10s | 3 |
| Supply voltage (recommended) | Vcc | 7 | 15 | 40 | V | | 3 |
| Collector output voltage (recommended) | Vc1;Vc2 | 30 | | 40 | V | | 3 |
| Collector output current, single transistor (recommended) | Ic1;Ic2 | | | 200 | mA | | 3 |
| Amplifier input voltage (recommended) | Vin | -0.3 | | | V | Printed max is Vcc-2.0 | 3 |
| Feedback current | Ifb | | | 0.3 | mA | | 3 |
| Reference output current | Iref | | | 10 | mA | | 3 |
| Timing resistor | RT | 1.8 | 30 | 500 | k | | 3 |
| Timing capacitor | CT | 0.00047 | 0.001 | 10 | F | | 3 |
| Oscillator frequency | fosc | 1 | 40 | 200 | kHz | | 3 |
| Reference voltage | Vref | 4.75 | 5 | 5.25 | V | Io=1.0mA | 4 |
| Reference voltage temperature variation | Vref/T | | 1.3 | 2.6 | % | Tamb from MIN to MAX | 4 |
| Line regulation | Reg line | | 2 | 25 | mV | Vcc=7.0V~40V | 4 |
| Load regulation | Reg load | | 2 | 15 | mV | Io=1.0mA~10mA | 4 |
| Short-circuit output current | Isc | | 32 | | mA | Vref=0V, Tamb=25℃ | 4 |
| Collector leakage current | Ic(off) | | 2 | 100 | A | Vcc=40V; Vce=40V | 4 |
| Emitter leakage current | Ie(off) | | -100 | | A | Vcc=40V; Vc=40V; Ve=0V | 4 |
| Collector-emitter saturation voltage, common emitter | Vc(sat) | | 1.1 | 1.3 | V | Ve=0V; Ic=200mA | 4 |
| Saturation voltage, emitter follower | Ve(sat) | | 1.5 | 2.5 | V | Vc=15V; Ie=-200mA | 4 |
| Output control pin current | IOCH | | 0.2 | 3.5 | mA | Voc=Vref | 4 |
| Output voltage rise time, common emitter | Tr | | 100 | 200 | ns | test fig 3 | 4 |
| Output voltage rise time, emitter follower | Tr | | 100 | 200 | ns | test fig 4 | 4 |
| Output voltage fall time, common emitter | Tf | | 25 | 100 | ns | test fig 3 | 4 |
| Output voltage fall time, emitter follower | Tf | | 40 | 100 | ns | test fig 4 | 4 |
| Input offset voltage | Vio | | 2 | 10 | mV | Vo(pin3)=2.5V | 4 |
| Input offset current | Iio | | 5 | 250 | nA | Vo(pin3)=2.5V | 4 |
| Input bias current | IIB | | 0.1 | 1 | A | Vo(pin3)=2.5V | 4 |
| Input common-mode voltage range | VICR | -0.3 | | | V | Vcc=7.0V~40V; printed max is Vcc-2.0 | 4 |
| Open-loop voltage gain | GVOL | 70 | 95 | | dB | Vo=0.5V~3.5V; RL=2.0k; Vo=3.0V | 4 |
| Unity-gain bandwidth | fc | | 800 | | kHz | Vo=0.5V~3.5V; RL=2.0k | 4 |
| Common-mode rejection ratio | CMRR | 65 | 90 | | dB | Vcc=40V | 4 |
| Error amplifier output sink current | Io- | | 0.3 | 0.7 | mA | Vo(pin3)=0.7V | 4 |
| Error amplifier output source current | Io+ | -4 | -2 | | mA | Vo(pin3)=3.5V | 4 |
| PWM comparator input threshold voltage, zero duty cycle | VTH | | 4 | 4.5 | V | zero duty cycle | 4 |
| PWM input sink current | II- | | 0.3 | 0.7 | mA | V(pin3)=0.7V | 4 |
| Dead-time input bias current | IIB(DT) | -10 | -2 | | A | Vin=0V~5.25V | 4 |
| Maximum duty cycle, per output | DCmax | | 45 | | % | Vin=0V; RT=12k; CT=0.1F | 4 |
| Input threshold voltage (pin4), zero duty cycle | VTH | | 3 | 3.3 | V | pin4, zero duty cycle | 4 |
| Start control low current input | ISTL | -200 | -25 | | A | V(pin3)=0.4V | 5 |
| Start control high current input | ISTH | | 25 | 200 | A | V(pin13)=2.4V | 5 |
| Start control high current input | ISTH | | 75 | | A | V(pin13)=Vref | 5 |
| Standby supply current | Icc | | 6 | 10 | mA | Vcc=15V; pin6 at Vref; other inputs and outputs open | 5 |
| Standby supply current | Icc | | 9 | 15 | mA | Vcc=40V; pin6 at Vref; other inputs and outputs open | 5 |
| Average supply current | | | 7.5 | | mA | Vcc=15V; RT=12k; CT=0.01F; V(pin14)=2.0V | 5 |
| Oscillator frequency | fosc | | 10 | | kHz | RT=12k; CT=0.01F | 5 |
| Standard frequency deviation | | | 3 | | % | RT=30k; CT=0.001F | 5 |
| Frequency variation with voltage | fosc/V | | 0.1 | | % | Vcc=7.0V~40V | 5 |
| Frequency variation with temperature | fosc/T | | 12 | | % | RT=12k; CT=0.01F; Tamb=Tlow~Thigh | 5 |
## CAD (KiCad official)
- Symbol: `TL494IMT`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `tl494imt-etched.step` / `tl494imt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl494imt.step` / `tl494imt.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8615629856621146112) (12 pp, sha256 `99e3d620b7c82bbd`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/tl494imt-datasheet.pdf)