component

HT3843BRZ

Public Made by Adom

by adom

HTCSEMI DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsht3843brzfactory-2.0.0extractor-text

Verified HT3843BRZ

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier lcsc, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: HT3843BRZ · SOP-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 16-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-4s25iw12/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ht3843brz.kicad_sym✓ ht3843brz.kicad_mod✓ ht3843brz.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 1d ago
viewers ht3843brz: viewers · Ray 1d ago
ht3843brz-etched.glb Publish 0.1.0 · Ray 1d ago
ht3843brz-etched.step ht3843brz: factory component page (tier=lcsc) · Ray 1d ago
ht3843brz-hero.glb ht3843brz: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
ht3843brz-hero.overlay.json Publish 0.1.0 · Ray 1d ago
ht3843brz.glb Publish 0.1.0 · Ray 1d ago
ht3843brz.kicad_mod Publish 0.1.0 · Ray 1d ago
ht3843brz.kicad_sym Publish 0.1.0 · Ray 1d ago
ht3843brz.lbr Publish 0.1.0 · Ray 1d ago
ht3843brz.step Publish 0.1.0 · Ray 1d ago
package.json Publish 0.1.0 · Ray 1d ago
page.json Set visibility: public · Ray 1d ago
README.md Publish 0.1.0 · Ray 1d ago
verification.json Verified: Published by the parts factory: tier lcsc, 8 pins · Ray 1d ago

HT3843BRZ

HTCSEMI · DC-DC Converters · SOP-8

HT3843BRZ from HTCSEMI, 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 Compensation output Error amplifier output made available for loop compensation; it is offset by two diode drops (1.4 V) and divided by three before connecting to the current sense comparator.
2 Voltage Feedback input Inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider.
3 Current Sense input Receives a voltage proportional to inductor current that terminates output switch conduction; under abnormal conditions the comparator threshold is internally clamped to 1.0 V.
4 RT/CT passive Programs the oscillator frequency and maximum output duty cycle with resistor RT to Vref and capacitor CT to ground; operation to 500 kHz is possible.
5 GND power_in Combined control circuitry and power ground.
6 Output output Directly drives the gate of a power MOSFET; peak currents up to 1.0 A are sourced and sunk by this pin.
7 VCC power_in Positive supply of the control IC; the bias and driver voltage maximum rating is 30 V.
8 Vref power_out 5.0 V reference output that provides charging current for CT through RT; it is short-circuit protected and capable of providing in excess of 20 mA.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package SOP-8
Category Power Management ICs
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
Reference output voltage Vref 4.9 5 5.1 V IO = 1.0mA, TJ = 25C 3
Line regulation Regline 2 20 mV VCC = 12V to 25V 3
Load regulation Regload 3 25 mV IO = 1.0mA to 20mA 3
Output short circuit current ISC -30 -85 -180 mA 3
Oscillator frequency fOSC 49 52 55 kHz TJ = 25C 3
Oscillator frequency over temperature range fOSC 48 56 kHz TA = Tlow to Thigh 3
Oscillator frequency (RT = 6.2k, CT = 1.0nF) fOSC 225 250 275 kHz TJ = 25C (RT = 6.2 k, CT = 1.0 nF) 3
Frequency change with voltage Δ fOSC/ΔV 0.2 1 % VCC = 12V to 25V 3
Oscillator discharge current Idischg 7.8 8.3 8.8 mA VOSC = 2.0V, TJ = 25C 3
Oscillator discharge current over temperature range Idischg 7.5 8.8 mA VOSC = 2.0V, TA = Tlow to Thigh 3
Voltage feedback input VFB 2.42 2.5 2.58 V VO = 2.5V 3
Error amplifier input bias current IIB -0.1 -2 µA VFB = 5.0V 3
Open loop voltage gain AVOL 65 90 dB VO = 2.0V to 4.0V 3
Unity gain bandwidth BW 0.7 1 MHz TJ = 25C 3
Error amplifier power supply rejection ratio PSRR 60 70 dB VCC = 12V to 25V 3
Error amplifier sink current ISink 2 12 mA VO = 1.1 V, VFB = 2.7 V 3
Error amplifier source current ISource -0.5 -1 mA VO = 5.0V, VFB = 2.3 V 3
Error amplifier output high state voltage VOH 5 6.2 V RL = 15 k to ground, VFB = 2.3V 3
Error amplifier output low state voltage VOL 0.8 1.1 V RL = 15 k to Vref, VFB = 2.7V 3
Current sense input voltage gain AV 2.85 3 3.15 V/V Notes 5 and 6 4
Maximum current sense input threshold Vth 0.9 1 1.1 V Note 5 4
Current sense input bias current IIB -2 -10 µA 4
Propagation delay (current sense input to output) tPLH(In/Out) 150 300 ns 4
Output low state voltage (20 mA sink) VOL 0.1 0.4 V ISink = 20 mA 4
Output low state voltage (200 mA sink) VOL 1.6 2.2 V ISink = 200 mA 4
Output high state voltage (20 mA source) VOH 13 13.5 V ISource = 20 mA 4
Output high state voltage (200 mA source) VOH 12 13.4 V ISource = 200 mA 4
Output voltage with UVLO activated VOL(UVLO) 0.1 1.1 V VCC = 6.0V, ISink = 1.0 mA 4
Output voltage rise time tr 50 150 ns CL = 1.0 nF, TJ = 25C 4
Output voltage fall time tf 50 150 ns CL = 1.0 nF, TJ = 25C 4
Startup threshold (VCC), HTX843B Vth 7.8 8.4 9 V 4
Minimum operating voltage after turn-on (VCC), HTX843B VCC(min) 7 7.6 8.2 V 4
Maximum duty cycle DC(max) 94 96 % 4
Minimum duty cycle DC(min) 0 % 4
Startup supply current ICC + IC 0.3 0.5 mA Startup, VCC = 6.5V for HTX843B, Note 7 4
Operating supply current ICC + IC 12 17 mA 4
Power supply zener voltage VZ 30 36 V ICC = 25mA 4
Bias and driver voltages VCC, VC 30 V Zero series impedance 2
Total power supply and zener current ICC + IZ 30 mA 2
Output current, source or sink IO 1 A 2
Output energy (capacitive load per cycle) W 5 µJ 2
Current sense, voltage feedback, Vref and RT/CT inputs Vin -0.3 5.5 V 2
Compensation Vcomp -0.3 7.2 V 2
Output voltage Vo -0.3 V 2
Error amplifier output sink current IO 10 mA 2
Maximum power dissipation, SOIC-8 (Case 751) PD 702 mW TA = 25C 2
Operating junction temperature TJ 150 °C 2
Operating ambient temperature TA 0 70 °C HT3842B, HT3843B 2
Storage temperature range Tstg -65 150 °C 2
Thermal resistance, junction-to-air, SOIC-8 (Case 751) RSJA 178 °C/W 2

CAD (KiCad official)

  • Symbol: HT3843BRZ
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: ht3843brz-etched.step / ht3843brz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht3843brz.step / ht3843brz.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (16 pp, sha256 44cced5d2cd7d9f2, retrieved 2026-11-05, 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