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UC2842BM

Public Made by Adom

by adom

HGSEMI AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)uc2842bmfactory-2.0.0extractor-text
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Contents

README

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UC2842BM

HGSEMI · AC-DC Controllers And Regulators · SOP-8

UC2842BM from HGSEMI, in a SOP-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 bidirectional Error amplifier compensation pin; the error amplifier output sink current is rated 10 mA maximum, and pulling this pin below two diode drops above ground shuts down the PWM output.
2 VFB input Error amplifier input with a 2.42 V to 2.58 V (2.50 V typical) input voltage, and analog inputs on pins 2 and 3 are rated -0.3 V to +6.3 V absolute maximum.
3 ISENSE input Current sense comparator input whose maximum input signal is 0.9 V to 1.1 V (1 V typical); raising this pin above 1 V shuts down the output, and the recommended input range is 0 V to 5.5 V.
4 RT / CT bidirectional Oscillator RC timing input with a recommended input range of 0 V to 5.5 V and an oscillator frequency range of 100 kHz to 500 kHz.
5 GND power_in Device power supply ground; timing and bypass capacitors should be connected close to this pin in a single-point ground.
6 OUTPUT output PWM gate drive output for N-channel MOSFETs, rated ±1 A peak and 200 mA average output current, held low in the off state and high impedance during under-voltage lockout.
7 VCC power_in Positive device supply with a recommended maximum of 28 V (30 V absolute maximum) and a start-up current below 0.5 mA.
8 VREF power_in Internal oscillator voltage reference of 5.00 V (4.95 V to 5.05 V at 25°C), with reference output current limited to 20 mA.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-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 VCC 30 V 3
Output Current Io -1 1 A 3
Output Energy (capacitive Load) W 5 µJ 3
Analog Inputs (pin 2,3) VI(ANA) -0.3 6.3 V 3
Error Amplifier Output Sink Current ISINK(EA) 10 mA 3
Power Dissipation PD 700 mW Tamb≤25°C 3
Junction Temperature TJ 150 °C 3
Storage Temperature Tstg -65 150 °C 3
Lead Temperature (Soldering) TL 245 °C Soldering, 10 seconds 3
Supply Voltage VCC 28 V 3
Input Voltage (RT/CT, VFB, ISENSE) VI 0 5.5 V 3
Supply Current ICC 25 mA 3
Average Output Current Io 200 mA 3
Reference Output Current Io(ref) -20 mA 3
Oscillator Frequency fosc 100 500 kHz 3
Operating free-air temperature Ta -40 85 °C 3
Output voltage VREF 4.95 5 5.05 V Ta=25°C, IL=1mA 3
Line regulation ∆VREF1 6 20 mV VCC=12V~25V 3
Load regulation ∆VREF2 6 25 mV IL=1mA~20mA 3
Temperature stability TS 0.2 0.4 mV/C 3
Total output variation ∆VREF3 4.82 5.18 V Line, Load, Temp 3
Long-term stability S 5 25 mV Ta=25°C, 1000hours 3
Output short circuit current ISC -30 -100 -180 mA VREF=0V, Ta=25°C 3
Initial Accuracy f 49 52 55 kHz Ta=25°C 3
Voltage stability ∆f/∆VCC 0.2 1 % VCC=12V~25V 3
Input Voltage VI(EA) 2.42 2.5 2.58 V Vpin 1=2.5V 4
Input Bias current IBIAS -0.1 -2 mA 4
Open-loop voltage gain AVOL 60 90 dB 2≤Vo≤4V 4
Unity Gain Bandwidth BW 0.7 1 mHz Ta=25°C 4
Power supply ripple rejection ratio (error amp) PSRR 60 70 dB 12≤VCC≤25V 4
Output Sink Current Isink 2 12 mA Vpin 2=2.7V, Vpin 1=1.1V 4
Output Source Current Isource -0.5 -1 mA Vpin 2=2.3V, Vpin 1=5V 4
Vout High VOH 5 6.2 V Vpin 2=2.3V, RL=15k to GND 4
Vout Low VOL 0.8 1.1 V Vpin 2=2.7V, RL=15k to VREF 4
Current sense Gain GV 2.85 3 3.15 V/V note 1, 2 4
Maximum Input signal VI(MAX) 0.9 1 1.1 V Vpin 1=5V (note 1) 4
Input Bias Current (current sense) IBIAS -2 -10 A 4
Delay to Output TPLH 150 300 ns Vpin 3=0 to 2V 4
Output low Level VOL 0.1 0.4 V Isink=20mA 4
Output low Level VOL 1.6 2.2 V Isink=200mA 4
Output High Level VOH 13 13.5 V Isource=20mA 4
Output High Level VOH 12 13.5 V Isource=200mA 4
Rise Time tR 50 150 ns Ta=25°C, CL=1nF 4
Fall Time tF 50 150 ns Ta=25°C, CL=1nF 4
UVLO Saturation VOL(UVLO) 0.7 1.2 V VCC=5V, Isink=1mA 4
Start Threshold VTH(ST) 15 16 17 V 4
Min. Operating Voltage After Turn On VOPR(min) 9 10 11 V 4
Min. duty cycle D(MIN) 0 % 4
Max. duty cycle D(MAX) 94 96 100 % 4
Start-up Current IST 0.3 0.5 mA 4
Operating Supply Current ICC(opr) 12 17 mA Vpin 2=Vpin 3=0V 4
Thermal Resistance, Junction to Ambient RthJA 180.6 °C/W 3

CAD (KiCad official)

  • Symbol: UC2842BM
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: uc2842bm-etched.step / uc2842bm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc2842bm.step / uc2842bm.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (10 pp, sha256 941cfec2cf89aabc, retrieved 2026-10-19, 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