component
CR6889B
Public Made by Adomby adom
Chip-Rail AC-DC Controllers & Regulators, SOT-23-6L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCR6889B
Chip-Rail · AC-DC Controllers & Regulators · SOT-23-6L
CR6889B from Chip-Rail, in a SOT-23-6L. 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 | GND | power_in | Ground reference pin for the controller, as printed as 地脚 (ground pin) on the SOT23-6L pinout. |
| 2 | FB | input | Voltage feedback pin that, together with CS, sets the output duty cycle and also controls the operating frequency; FB rising above 4.1 V for 60 ms triggers overload protection. |
| 3 | OVP | input | Senses the auxiliary-winding voltage through an external resistor divider to set the output overvoltage threshold (3 V typical, 2.85 V to 3.15 V), and leaving it floating disables output OVP. |
| 4 | CS | input | Current sense pin where a resistor between the MOSFET source and ground senses inductor current, with overcurrent threshold 0.45 V typical at 0% duty and clamp at 0.72 V. |
| 5 | VDD | power_in | Supply pin with UVLO turn-on at 17.2 V typical and recommended operating range 12 V to 26 V, VDD overvoltage protection at 28 V typical, and absolute maximum rating of 30 V. |
| 6 | GATE | output | Gate driver output that drives the external power MOSFET gate, with output low 1 V maximum at 5 mA, output high 6 V at 20 mA, and clamp voltage 11 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Chip-Rail |
| Package | SOT-23-6L |
| Category | Power Management ICs |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 电源电压 | VVDD | -0.3 | 30 | V | 3 | ||
| FB脚输入电压 | VFB | -0.3 | 7 | V | 3 | ||
| CS脚输入电压 | VCS | -0.3 | 7 | V | 3 | ||
| OVP脚输入电压 | VOVP | -0.3 | 7 | V | 3 | ||
| 焊接温度 | TL | 260 | ℃ | 10s | 3 | ||
| 工作结温范围 | TSTG | -40 | 150 | ℃ | 3 | ||
| VDD电压 | VVDD | 12 | 26 | V | 3 | ||
| 工作温度 | TOA | -20 | 85 | ℃ | 3 | ||
| 启动电流 | IST | 3 | 10 | μA | UVLO_OFF-1V | 4 | |
| 工作电流 | IOP | 2.5 | 3.5 | mA | VCS=4.5V, VFB=3V | 4 | |
| CRM模式工作电流 | IOP_CRM | 0.6 | 0.7 | mA | VCS=0V, VFB=0.5V | 4 | |
| 系统启动VDD电压 | UVLO_OFF | 16.2 | 17.2 | 18.2 | V | 4 | |
| 系统关断VDD电压 | UVLO_ON | 6.8 | 7.3 | 7.8 | V | 4 | |
| VDD过压保护 | VDD_OVP | 26.5 | 28 | 29.5 | V | 4 | |
| 最大占空比 | DMAX | 77 | 80 | 83 | % | 4 | |
| 0占空比时过流检测阈值电压 | VTH_OC | 0.43 | 0.45 | 0.47 | V | 0 占空比时 | 4 |
| 输出过压保护电压阈值 | VOutput_OVP | 2.85 | 3 | 3.15 | V | 4 | |
| PWM频率 | FOSC | 60 | 65 | 70 | kHz | 5 | |
| 频率抖动范围 | ΔFJITTER | -6 | 6 | % | 5 | ||
| GATE上拉PMOS开启时VDD电压 | VPULL_UP | 10 | V | 4 | |||
| PWM输入增益 | AVCS | 3.5 | V/V | △FB/△CS | 4 | ||
| FB短路电流 | IFB | 200 | μA | VFB=0V | 4 | ||
| FB开路电压 | VFB | 5.1 | V | VFB=Open | 4 | ||
| 进入PFM时的FB电压 | VREF_GREEN | 2.1 | V | 4 | |||
| 退出CRM时的FB电压 | VCRM_H | 1.23 | V | 4 | |||
| 进入CRM时的FB电压 | VCRM_L | 1.13 | V | 4 | |||
| 过载保护时FB电压 | VOLP | 4.1 | V | 4 | |||
| 过载保护延迟时间 | TOLP | 60 | ms | 4 | |||
| 软启动时间 | TSS | 2.5 | ms | 4 | |||
| 前沿消隐时间 | TLEB | 300 | ns | 4 | |||
| 过流检测延迟时间 | TD_OC | 90 | ns | 4 | |||
| 过流检测箝位电压 | VTH_OC_CLAMP | 0.72 | V | 4 | |||
| 过热保护检测的温度 | OTP | 150 | ℃ | 4 | |||
| 过热保护检测迟滞 | Hys. | 30 | ℃ | 4 | |||
| 输出过压保护检测延迟时间 | TD_Output_OVP | 6 | Cycles | 4 | |||
| 输出低电平 | VOL | 1 | V | IO=5mA | 5 | ||
| 输出高电平 | VOH | 6 | V | IO=20mA | 5 | ||
| 输出箝位电压 | VCLAMP | 11 | V | 5 | |||
| 上升时间 | TR | 100 | ns | CL=1nF | 5 | ||
| 下降时间 | TF | 30 | ns | CL=1nF | 5 | ||
| PFM最小频率 | FPFM | 22 | kHz | 5 | |||
| VDD对PWM频率的影响 | ΔFVDD | 1 | % | 5 | |||
| 温度对PWM频率的影响 | ΔFTEMP | 1 | % | -30~100℃ | 5 | ||
| 频率抖动周期 | FJITTER | 32 | Hz | 5 |
CAD (KiCad official)
- Symbol:
CR6889B - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6L (KiCad packages3D, STEP)
- 3D model files:
cr6889b-etched.step/cr6889b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cr6889b.step/cr6889b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Chip-Rail datasheet (10 pp, sha256
47730a647c462c00, retrieved 2026-11-02, 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, 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).