component
TL3843BP-TUDI
Public Made by Adomby adom
Tudi AC-DC Controllers And Regulators, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TL3843BP-TUDI
Tudi · AC-DC Controllers And Regulators · DIP-8
TL3843BP-TUDI from Tudi, in a DIP-8. 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 | COMP | output | Error amplifier output used for loop compensation, with an error amplifier output sink current absolute maximum of 10 mA. |
| 2 | VFB | input | Inverting input of the error amplifier, normally connected to the switching supply output through a resistor divider, with analog input voltage limited to -0.3 V to 5.5 V. |
| 3 | ISENSE | input | Current-sense input carrying a voltage proportional to inductor current that the PWM uses to terminate output conduction, with analog input voltage limited to -0.3 V to 5.5 V and a maximum input signal of about 1.0 V typical. |
| 4 | RT/CT | passive | Oscillator timing pin where resistor RT connects to Vref and capacitor CT connects to ground, programming the oscillator frequency and maximum output duty cycle. |
| 5 | GND | power_in | Combined control circuitry and power ground for the IC (listed as GROUND in the pin function table). |
| 6 | OUTPUT | output | Totem-pole output that directly drives a power MOSFET gate, sourcing and sinking peak currents up to 1 A, and is low when in the off state. |
| 7 | VCC | power_in | Positive supply pin of the IC, with a supply voltage absolute maximum of 30 V from a low-impedance source. |
| 8 | Vref | power_out | Reference output providing 5.0 V typical (4.9 V to 5.1 V at 1 mA) and the charging current for CT through RT. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Tudi |
| Package | DIP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
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 (low impedance source) | VCC | 30 | V | low impedance source | 2 | ||
| Output Current | IO | -1 | 1 | A | 2 | ||
| Input Voltage (Analog Inputs pins 2,3) | VI | -0.3 | 5.5 | V | Analog inputs pins 2,3 | 2 | |
| Error Amp Output Sink Current | ISINK (E.A) | 10 | mA | 2 | |||
| Power Dissipation | PO | 1 | W | TA=25°C | 2 | ||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Lead Temperature (soldering 5 sec.) | TL | 260 | °C | soldering 5 sec. | 2 | ||
| Operating ambient temperature (TL384xB series) | TA | 0 | 70 | °C | TA=0°C to +70°C, unless otherwise specified | 3 | |
| Reference Output Voltage | VREF | 4.9 | 5 | 5.1 | V | TJ = 25°C, IREF = 1 mA | 3 |
| Line Regulation | ΔVREF | 6 | 20 | mV | 12V ≤ VCC ≤ 25 V | 3 | |
| Load Regulation | ΔVREF | 6 | 25 | mV | 1 mA ≤ IREF ≤ 20mA | 3 | |
| Short Circuit Output Current | ISC | -100 | -180 | mA | TA = 25°C | 3 | |
| Oscillation Frequency | f | 47 | 52 | 57 | KHz | TJ = 25°C | 3 |
| Frequency Change with Voltage | Δf/ΔVCC | 0.05 | 1 | % | 12V ≤ VCC ≤ 25 V | 3 | |
| Input Bias Current | IBIAS | -0.1 | -2 | µA | VFB=3V | 3 | |
| Input Voltage | VI(E.A) | 2.42 | 2.5 | 2.58 | V | Vpin1 = 2.5V | 3 |
| Open Loop Voltage Gain | AVOL | 65 | 90 | dB | 2V ≤ V0 ≤ 4V | 3 | |
| Unity Gain Bandwidth | UGBW | 0.5 | 0.6 | MHz | Tj=25 C, Note 3 | 3 | |
| Power Supply Rejection Ratio | PSRR | 60 | 70 | dB | 12V ≤ VCC ≤ 25 V | 3 | |
| Output Sink Current | ISINK | 2 | 7 | mA | Vpin2 = 2.7V, Vpin1 = 1.1V | 3 | |
| Output Source Current | ISOURCE | -0.5 | -1 | mA | Vpin2 = 2.3V, Vpin1 = 5V | 3 | |
| High Output Voltage (E.A.) | VOH | 5 | 6 | V | Vpin2 = 2.3V, RL = 15KΩ to GND | 3 | |
| Low Output Voltage (E.A.) | VOL | 0.8 | 1.1 | V | Vpin2 = 2.7V, RL = 15KΩ to PIN 8 | 3 | |
| Gain | GV | 2.85 | 3 | 3.15 | V/V | Note 1 & 2 | 3 |
| Maximum Input Signal | VI(MAX) | 0.9 | 1 | 1.1 | V | Vpin1 = 5V (Note 1) | 3 |
| Input Bias Current (current sense) | IBIAS | -3 | -10 | µA | Vpin3 = 3V | 3 | |
| Low Output Voltage | VOL | 0.08 | 0.4 | V | ISINK = 20 mA | 3 | |
| Low Output Voltage | VOL | 1.4 | 2.2 | V | ISINK = 200 mA | 3 | |
| High Output Voltage | VOH | 13 | 13.5 | V | ISINK = 20 mA | 3 | |
| High Output Voltage | VOH | 12 | 13 | V | ISINK = 200 mA | 3 | |
| Rise Time | tR | 45 | 150 | nS | TJ = 25°C, CL = 1nF (Note 3) | 3 | |
| Fall Time | tF | 35 | 150 | nS | TJ = 25°C, CL = 1nF (Note 3) | 3 | |
| Start Threshold | VTH(ST) | 7.8 | 8.4 | 9 | V | TL2843/45,TL3843/45 | 3 |
| Min. Operating Voltage (After Turn On) | VOPR(min) | 7 | 7.6 | 8.2 | V | TL2843/45,TL3843/45 | 3 |
| Max. Duty Cycle | D(MAX) | 95 | 97 | 100 | % | TL2842/43,TL3842/43 | 3 |
| Min. Duty Cycle | D(MAX) | 0 | % | 3 | |||
| Start-Up Current | IST | 0.17 | 0.3 | mA | TL3842/43/44/45 | 3 | |
| Operating Supply Current | ICC (OPR) | 13 | 17 | mA | Vpin3 = Vpin2 = 0V | 3 | |
| Zener Voltage | VZ | 30 | 38 | V | ICC=25 mA | 3 | |
| Oscillator Amplitude (peak to peak) | V(OSC) | 1.6 | V | peak to peak | 3 | ||
| Supply Voltage Rejection | SVR | 70 | dB | 12V ≤ VCC ≤ 25 V (Note 1) | 3 |
CAD (KiCad official)
- Symbol:
TL3843BP-TUDI - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files:
tl3843bp-tudi-etched.step/tl3843bp-tudi-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl3843bp-tudi.step/tl3843bp-tudi.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Tudi datasheet (11 pp, sha256
05fbdc4090dd7e00, retrieved 2026-10-15, tier: lcsc) - 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).
# TL3843BP-TUDI
**Tudi** · AC-DC Controllers And Regulators · DIP-8
TL3843BP-TUDI from Tudi, in a DIP-8. 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 | COMP | output | Error amplifier output used for loop compensation, with an error amplifier output sink current absolute maximum of 10 mA. |
| 2 | VFB | input | Inverting input of the error amplifier, normally connected to the switching supply output through a resistor divider, with analog input voltage limited to -0.3 V to 5.5 V. |
| 3 | ISENSE | input | Current-sense input carrying a voltage proportional to inductor current that the PWM uses to terminate output conduction, with analog input voltage limited to -0.3 V to 5.5 V and a maximum input signal of about 1.0 V typical. |
| 4 | RT/CT | passive | Oscillator timing pin where resistor RT connects to Vref and capacitor CT connects to ground, programming the oscillator frequency and maximum output duty cycle. |
| 5 | GND | power_in | Combined control circuitry and power ground for the IC (listed as GROUND in the pin function table). |
| 6 | OUTPUT | output | Totem-pole output that directly drives a power MOSFET gate, sourcing and sinking peak currents up to 1 A, and is low when in the off state. |
| 7 | VCC | power_in | Positive supply pin of the IC, with a supply voltage absolute maximum of 30 V from a low-impedance source. |
| 8 | Vref | power_out | Reference output providing 5.0 V typical (4.9 V to 5.1 V at 1 mA) and the charging current for CT through RT. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Tudi |
| Package | DIP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
## 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 (low impedance source) | VCC | | | 30 | V | low impedance source | 2 |
| Output Current | IO | -1 | | 1 | A | | 2 |
| Input Voltage (Analog Inputs pins 2,3) | VI | -0.3 | | 5.5 | V | Analog inputs pins 2,3 | 2 |
| Error Amp Output Sink Current | ISINK (E.A) | | | 10 | mA | | 2 |
| Power Dissipation | PO | | | 1 | W | TA=25°C | 2 |
| Storage Temperature Range | Tstg | -65 | | 150 | °C | | 2 |
| Lead Temperature (soldering 5 sec.) | TL | | | 260 | °C | soldering 5 sec. | 2 |
| Operating ambient temperature (TL384xB series) | TA | 0 | | 70 | °C | TA=0°C to +70°C, unless otherwise specified | 3 |
| Reference Output Voltage | VREF | 4.9 | 5 | 5.1 | V | TJ = 25°C, IREF = 1 mA | 3 |
| Line Regulation | ΔVREF | | 6 | 20 | mV | 12V ≤ VCC ≤ 25 V | 3 |
| Load Regulation | ΔVREF | | 6 | 25 | mV | 1 mA ≤ IREF ≤ 20mA | 3 |
| Short Circuit Output Current | ISC | | -100 | -180 | mA | TA = 25°C | 3 |
| Oscillation Frequency | f | 47 | 52 | 57 | KHz | TJ = 25°C | 3 |
| Frequency Change with Voltage | Δf/ΔVCC | | 0.05 | 1 | % | 12V ≤ VCC ≤ 25 V | 3 |
| Input Bias Current | IBIAS | | -0.1 | -2 | µA | VFB=3V | 3 |
| Input Voltage | VI(E.A) | 2.42 | 2.5 | 2.58 | V | Vpin1 = 2.5V | 3 |
| Open Loop Voltage Gain | AVOL | 65 | 90 | | dB | 2V ≤ V0 ≤ 4V | 3 |
| Unity Gain Bandwidth | UGBW | | 0.5 | 0.6 | MHz | Tj=25 C, Note 3 | 3 |
| Power Supply Rejection Ratio | PSRR | 60 | 70 | | dB | 12V ≤ VCC ≤ 25 V | 3 |
| Output Sink Current | ISINK | 2 | 7 | | mA | Vpin2 = 2.7V, Vpin1 = 1.1V | 3 |
| Output Source Current | ISOURCE | | -0.5 | -1 | mA | Vpin2 = 2.3V, Vpin1 = 5V | 3 |
| High Output Voltage (E.A.) | VOH | 5 | 6 | | V | Vpin2 = 2.3V, RL = 15KΩ to GND | 3 |
| Low Output Voltage (E.A.) | VOL | | 0.8 | 1.1 | V | Vpin2 = 2.7V, RL = 15KΩ to PIN 8 | 3 |
| Gain | GV | 2.85 | 3 | 3.15 | V/V | Note 1 & 2 | 3 |
| Maximum Input Signal | VI(MAX) | 0.9 | 1 | 1.1 | V | Vpin1 = 5V (Note 1) | 3 |
| Input Bias Current (current sense) | IBIAS | | -3 | -10 | µA | Vpin3 = 3V | 3 |
| Low Output Voltage | VOL | | 0.08 | 0.4 | V | ISINK = 20 mA | 3 |
| Low Output Voltage | VOL | | 1.4 | 2.2 | V | ISINK = 200 mA | 3 |
| High Output Voltage | VOH | 13 | 13.5 | | V | ISINK = 20 mA | 3 |
| High Output Voltage | VOH | 12 | 13 | | V | ISINK = 200 mA | 3 |
| Rise Time | tR | | 45 | 150 | nS | TJ = 25°C, CL = 1nF (Note 3) | 3 |
| Fall Time | tF | | 35 | 150 | nS | TJ = 25°C, CL = 1nF (Note 3) | 3 |
| Start Threshold | VTH(ST) | 7.8 | 8.4 | 9 | V | TL2843/45,TL3843/45 | 3 |
| Min. Operating Voltage (After Turn On) | VOPR(min) | 7 | 7.6 | 8.2 | V | TL2843/45,TL3843/45 | 3 |
| Max. Duty Cycle | D(MAX) | 95 | 97 | 100 | % | TL2842/43,TL3842/43 | 3 |
| Min. Duty Cycle | D(MAX) | 0 | | | % | | 3 |
| Start-Up Current | IST | | 0.17 | 0.3 | mA | TL3842/43/44/45 | 3 |
| Operating Supply Current | ICC (OPR) | | 13 | 17 | mA | Vpin3 = Vpin2 = 0V | 3 |
| Zener Voltage | VZ | 30 | | 38 | V | ICC=25 mA | 3 |
| Oscillator Amplitude (peak to peak) | V(OSC) | | 1.6 | | V | peak to peak | 3 |
| Supply Voltage Rejection | SVR | | 70 | | dB | 12V ≤ VCC ≤ 25 V (Note 1) | 3 |
## CAD (KiCad official)
- Symbol: `TL3843BP-TUDI`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `tl3843bp-tudi-etched.step` / `tl3843bp-tudi-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl3843bp-tudi.step` / `tl3843bp-tudi.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Tudi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604436101285498880) (11 pp, sha256 `05fbdc4090dd7e00`, retrieved 2026-10-15, tier: lcsc)
- **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/tl3843bp-tudi-datasheet.pdf)