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HT494ARZ

Public Made by Adom

by adom

HTCSEMI AC-DC Controllers And Regulators, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HT494ARZ

HTCSEMI · AC-DC Controllers And Regulators · SOP-16

HT494ARZ from HTCSEMI, in a SOP-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 1IN+ input Error amplifier 1 non-inverting input; common-mode range -0.3 V to Vcc-2 V.
2 1IN- input Error amplifier 1 inverting input; common-mode range -0.3 V to Vcc-2 V.
3 FEEDBACK bidirectional Error amplifier outputs and PWM comparator input node used for loop compensation; current into this terminal is limited to 0.3 mA.
4 DTC input Dead-time control input; 0 V gives maximum duty cycle and about 3.3 V gives zero duty cycle, input bias current -10 µA max.
5 CT passive Timing capacitor connection for the oscillator, recommended 0.47 nF to 10000 nF.
6 RT passive Timing resistor connection for the oscillator, recommended 1.8 kΩ to 500 kΩ.
7 GND power_in Ground.
8 C1 passive Collector of output transistor 1, uncommitted, rated 200 mA sink/source and 40 V maximum recommended.
9 E1 passive Emitter of output transistor 1, uncommitted for common-emitter or emitter-follower operation.
10 E2 passive Emitter of output transistor 2, uncommitted for common-emitter or emitter-follower operation.
11 C2 passive Collector of output transistor 2, uncommitted, rated 200 mA sink/source and 40 V maximum recommended.
12 VCC power_in Supply voltage input, recommended 7 V to 40 V (absolute maximum 41 V).
13 OUTPUT CTRL input Output control: grounded gives single-ended or parallel output, tied to Vref gives normal push-pull operation.
14 REF power_out 5 V reference regulator output, 4.75 V to 5.25 V at Io=1 mA.
15 2IN- input Error amplifier 2 inverting input; common-mode range -0.3 V to Vcc-2 V.
16 2IN+ input Error amplifier 2 non-inverting input; common-mode range -0.3 V to Vcc-2 V.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package SOP-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 Vcc 7 40 V 2
Amplifier Input Voltage -0.3 V 2
Collector Output Voltage 40 V 2
Collector Output Current (each transistor) 200 mA 2
Current Into Feedback Terminal 0.3 mA 2
Timing Capacitor CT 0.47 10000 nF 2
Timing Resistor RT 1.8 500 k 2
Oscillator Frequency fOSC 1 300 kHz 2
Operating Free-Air Temperature TA -20 85 oC 2
Supply Voltage Vcc 41 V 2
Collector Output Voltage 41 V 2
Continuous Total Dissipation at or below 25oC 1000 mV at or below 25oC 2
Operating Free-Air Temperature Range TA -20 85 oC 2
Storage Temperature Range Tstg -65 150 oC 2
Collector Output Current 250 mA 2
Output voltage (Vref) Vref 4.75 5.25 V Io=1mA 2
Input regulation 25 mV Vcc=7V to 40V, Ta=25oC 2
Output regulation 15 mV Io=1 to 10mA, Ta=25oC 2
Output voltage change with temperature 1 % Ta=-20 oC to 85 oC 2
Short circuit output current 60 mV 2
Input bias current (pin 4) IIB -10 A Vi=0V to 5.25V 2
Maximum duty cycle (each output) DCmax 45 % Vi(pin 4)=0V 2
Input threshold voltage (pin 4) 3.3 V zero duty cycle 2
Input threshold voltage (pin 4) 0 V maximum duty cycle 2
Input offset voltage VIO 10 mV Vo(pin 3)=2.5 2
Input offset current IIO 250 nA Vo(pin 3)=2.5 2
Input bias current IIB 1 A Vo(pin 3)=2.5 2
Common mode input voltage range LOW VICR -0.3 V Vcc=7 to 40V 2
Open loop voltage amplification AVD 70 dB Vo=3V, Vo=0.5 to 3.5V 2
Common mode rejection ratio CMRR 65 dB Vcc=40V, Ta=25oC 2
Output sink current (pin 3) IO- 0.3 mA VID=-15mV to -5V, Vo(pin 3)=0.7V 2
Output source current (pin 3) IO+ -2 mA VID=15mV to 5V, Vo(pin 3)=3.5V 2
Input threshold voltage (pin 3) 4.5 V zero duty cycle 3
Input sink current (pin 3) 0.3 mA Vo(pin 3)=0.7V 3
Output voltage rise time tr 200 ns Common emitter configuration 3
Output voltage fall time tf 100 ns Common emitter configuration 3
Collector off-state current ICEX 100 A VCE=40V, Vcc=40V 3
Emitter off-state current IEX -100 A Vcc=Vc=40V, VE=40V 3
Collector-Emitter saturation voltage (common emitter) VCE(sat) 1.3 V VE=0, Ic=200mA 3
Collector-Emitter saturation voltage (emitter-follower) VCE(sat) 2.5 V Vc=15V, IE=-200mA 3
Output control input current 3.5 mA Vi=Vref 3
Standard deviation of frequency 30 % All values of Vcc, CT, RT, Ta are constant 3
Frequency change with voltage 10 % Vcc=7V to 40V, Ta=25oC 3
Power rating (package D) at TA=25oC PD 900 mW Package D, TA=25oC 2
Power rating (package D) at TA=70oC PD 608 mW Package D, TA=70oC 2
Power rating (package D) at TA=85oC PD 494 mW Package D, TA=85oC 2
Frequency fOSC 30 kHz CT=0.01F, RT=12k 3
Unity-gain bandwidth 100 kHz 2
Derating factor above TA (package D) 7.6 mW/oC Derate above TA=25oC 2

CAD (KiCad official)

  • Symbol: HT494ARZ
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOP-16 (KiCad packages3D, STEP)
  • 3D model files: ht494arz-etched.step / ht494arz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht494arz.step / ht494arz.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HTCSEMI datasheet (5 pp, sha256 64bc3d957ff0775b, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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