component

FL7733AMX

Public Made by Adom

by adom

onsemi LED Drivers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

markdown

FL7733AMX

onsemi · LED Drivers · SOIC-8

FL7733AMX from onsemi, in a SOIC-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 CS input Current sense: a current-sense resistor connects here to detect MOSFET current for constant output current regulation.
2 GATE output PWM signal output driving the power MOSFET through an internal totem-pole output driver.
3 GND power_in Ground reference for the controller; the datasheet's PCB guidance says signal ground and power ground should join only at this pin.
4 VDD power_in Power supply pin that provides both the IC operating current and the MOSFET gate-drive current; UVLO turn-on is 16 V and turn-off is 7.75 V, and VDD OVP is 23 to 25 V.
5 VS power_in Voltage sense that detects output voltage and discharge time for constant-current regulation, connected through a resistor divider to the transformer auxiliary winding; the output overvoltage threshold is 3.00 V typical.
6 COMI passive Constant-current loop compensation pin, with a capacitor (typically above 1 µF) connected between COMI and GND to compensate the current-loop gain.
7 NC unconnected Not connected.
8 HV input High-voltage pin connected to the rectified input through a resistor; the datasheet rates the HV pin voltage at 700 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-8
Category LED Drivers
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
HV 引脚电压 HV 700 V 5
直流电源电压 VVDD 30 V 5
VS 引脚输入电压 VVS -0.3 6 V 5
CS 引脚输入电压 VCS -0.3 6 V 5
COMI 引脚输入电压 VCOMI -0.3 6 V 5
GATE 引脚输入电压 VGATE -0.3 30 V 5
功耗 PD 633 mW TA<50℃ 5
最大结温 TJ 150 ℃ 5
存储温度范围 TSTG -55 150 ℃ 5
引脚温度（焊接） TL 260 ℃ 10 秒 5
导通阈值电压 VDD-ON 14.5 16 17.5 V 6
关断阈值电压 VDD-OFF 6.75 7.75 8.75 V 6
工作电流 IDD-OP 3 4 5 mA CL=1 nF，f=fMAX-CC 6
启动电流（两值，列位置待确认） IDD-ST 30 50 μA VDD=VDD-ON-1.6 V 6
VDD 过压保护水平 VVDD-OVP 23 24 25 V 6
上升时间 tR 100 150 200 ns TA=25℃, VDD=15 V, CLOAD =1 nF 6
下降时间 tF 20 60 100 ns TA=25℃, VDD=15 V, CLOAD=1 nF 6
输出箝位电压 VCLAMP 12 15 18 V VDD=20 V, VCS=0 V, VVS=0 V, VCOM=0 V 6
启动后的漏电流（两值，列位置待确认） IHV-LC 1 10 μA 6
启动后的 JFET 调节时间 tR-JFET 190 250 310 ms TA=25℃ 6
JFET 调节电压上限 VJFET-HL 17.5 19 20.5 V 6
JFET 调节电压下限 VJFET-LL 11.5 13 14.5 V 6
跨导 gM 11 17 23 μmho TA=25℃ 6
COMI 灌电流 ICOMI-SINK 12 18 24 μA TA=25℃, VEAI=2.55 V, VCOMI=5 V 6
/COMI 源电流/ ICOMI-SOURCE 12 18 24 μA TA=25℃, VEAI=0.45 V, VCOMI=0 V 6
tDIS：VS 消隐时间 tDIS-BNK 0.85 1.15 1.45 μs 7
VS：VS 消隐电流 IVS-BNK -75 -90 -105 μA 7
VS：输出过压保护电平 VVS-OVP 2.95 3 3.15 V 7
VS：使能低电平限流的阈值电压 VVS-LOW-CL-EN 0.25 0.3 0.35 V 7
VS：禁用低电平限流的阈值电压 VVS-HIGH-CL-DIS 0.54 0.6 0.66 V 7
VS：输出短路 LED 保护阈值电压 VVS-SLP-TH 0.25 0.3 0.35 V 7
参考电压 VRV 1.485 1.5 1.515 V TA=25℃ 7
到栅极输出端的传播延迟 tPD 50 100 150 ns 7
限流阈值上限 VCS-HIGH-CL 0.9 1 1.1 V 7
限流阈值下限 VCS-LOW-CL 0.16 0.2 0.24 V 7
过流保护的 VCS 阈值电压 VCS-OCP 1.2 1.35 1.5 V TA=25℃ 7
恒流最大频率 fMAX-CC 65 70 75 kHz TA=25℃, VS=3.0 V 7
恒流最小频率 fMIN-CC 23 26.5 30 kHz TA=25℃, VS=0.3 V 7
最大导通时间 tON-MAX 11 13 15 μs TA=25℃, f=fMAX-CC 7
工作电流（启动电流对应行之前的 IHV 源电流） IHV 9 mA TA=25℃, VIN=90 VAC, VDD=0 V 6
输出低电平 VOL 1.5 V TA=25℃, VDD=20 V, IDD_GATE=1 mA 6
输出高电平 VOH 5 V TA=25℃, VDD=10 V, IDD=1 mA 6
峰值源电流 ISOURCE -60 mA VDD=10 ~ 20 V 6
峰值吸电流 ISINK 180 mA VDD=10 ~ 20 V 6
COMI 高电平 VCOMI-HGH 4.7 V VEAI=0 V 6
COMI 低电平 VCOMI-LOW 0.1 V VEAI=5 V 6
初始 COMI 箝位电压 VCOMI_INT.CLP 1.2 V 6
初始 COMI 箝位时间 tCOMI_INT.CLP 15 ms 6
启动后检测禁用时间 tSLP-BNK 15 ms TA=25℃ 7
前沿消隐时间 tLEB 300 ns 7
CC 最低导通时间 tMIN 500 ns VCOMI=0 V 7
启动时的低电流模式工作时间 tLOW-CM 20 ms 7
检测电阻短路保护的 VCS 阈值电压 VCS-SRSP 0.1 V 7
线路补偿电压与 VS 电流的关系 VCS / IVS 21.5 V/A 7
OTP 阈值温度 TOTP 150 ℃ 7
重启结温滞回 TOTP-HYS 10 ℃ 7
节-环境之间热阻 JA 158 ℃/W 5
结壳热阻 JC 39 ℃/W 5

CAD (KiCad official)

  • Symbol: FL7733AMX
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: fl7733amx-etched.step / fl7733amx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fl7733amx.step / fl7733amx.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (15 pp, sha256 7cbbccfd40894c34, retrieved 2026-10-19, 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