4 layers71.9 × 55.5 mm
RISKYMSXCart
arkadiuszmakarenko/RISKYMSX
RISKY MSX Cartridge based on WCH CH32V303V chip. It is 256KB cart programmed using USB Fat32 flash drive
39 parts23
CH217K
WCH (Nanjing Qinheng Microelectronics)Extended
-40℃~+85℃ 1 2.7A 2.7V~5.5V 70mΩ Active Low Load Switch Undervoltage Protection(UVP)、Overcurrent Protection(OCP)、Over temperature protection(OTP) SOT-23-6 Power Distribution Switches ROHS
- Part id
- wch/CH217K
- Category
- Power Distribution Switches
- Package
- SOT-23-6
- Pins
- 6
- In stock
- 0 at JLCPCB (C7462749)
- Used on
- 29 open-source boards
Overview
The CH217K is a power Distribution Switche made by WCH (Nanjing Qinheng Microelectronics) in a SOT-23-6 package with 6 pins. -40℃~+85℃ 1 2.7A 2.7V~5.5V 70mΩ Active Low Load Switch Undervoltage Protection(UVP)、Overcurrent Protection(OCP)、Over temperature protection(OTP) SOT-23-6 Power Distribution Switches ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:CH217K, from EasyEDA) and its footprint (Package_TO_SOT_SMD:SOT-23-6, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C7462749). 29 open-source boards in 16 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
9- Supply, least
- 2.7 V · VIN, recommended operating min · p. 3
- Supply, most
- 5.5 V · VIN, recommended operating max · p. 3
- Supply, absolute maximum
- 6 V · VIN, absolute max · p. 2
- Works from
- -40 °C · Operating ambient temperature min · p. 2
- Works up to
- 85 °C · Operating ambient temperature max · p. 2
- Takes working
- 75 µA · Quiescent current typical, enabled, VIN = 5 V · p. 3
- Takes asleep
- 100 nA · Shutdown current typical, EN# high · p. 3
- Current limit
- 2 A · Current limit typical, Rset = 30K · p. 3
- Junction to air (SOT23-6)
- 220 K/W · Junction-to-ambient thermal resistance · p. 3
What it is and has
5- Power switch
- Integrated, typical on-resistance 70mΩ · p. 1
- Programmable current limit
- 400mA～2.7A, set by external resistor · p. 1
- Protection
- Fast current limiting during output short circuit · p. 1
- Shutdown behavior
- No reverse current when switched off · p. 1
- Package
- SOT23-6 · p. 1
Around it
5- cap 10uF 或以上
- between VIN and GND; Recommended external input capacitor. · p. 2
- res Rset 不小于 22K
- between ISET and GND; Sets current limit using Iset=60K/Rset. · p. 2
- res 56K
- between ISET and GND; Application example sets the current limit to approximately 1A; select according to supply capability. · p. 4
- cap 120uF
- between VOUT and GND; Typical USB output capacitor value for C4/C5/C6/C7. · p. 4
- cap 10uF
- between VOUT and GND; Output capacitance may be as low as this in non-USB applications. · p. 4
Specifications
20| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| 工作时的环境温度 TA | min -40 · max 85 ℃ | 2 | |
| 储存时的环境温度 TS | min -55 · max 150 ℃ | 2 | |
| 电源电压 VIN | min -0.4 · max 6 V | 2 | |
| 输出电压 VOUT | min -0.4 · max 6 V | 2 | |
| EN#或 EN 或 FLAG#引脚上的电压 VIO | min -0.4 · max 6 V | 2 | |
| 整个芯片的最大功耗 PD | max 550 mW | 3 | |
| 电源电压 VIN | TA=25℃、Rset=30KΩ | min 2.7 · typ 5 · max 5.5 V | 3 |
| 静态工作电流 Iq | TA=25℃、VIN=5V、Rset=30KΩ；EN#=L | min 30 · typ 75 · max 180 uA | 3 |
| 关机电流 Isd | TA=25℃、VIN=5V、Rset=30KΩ；EN#=H | min 0 · typ 0.1 · max 3 uA | 3 |
| EN#/EN 引脚低电平输入电压 VIL | TA=25℃、VIN=5V、Rset=30KΩ；CH217K EN# | min 0 · max 0.7 V | 3 |
| EN#/EN 引脚高电平输入电压 VIH | TA=25℃、VIN=5V、Rset=30KΩ；CH217K EN# | min 1.6 · max 5 V | 3 |
| FLAG#引脚低电平输出电压 VOL | TA=25℃、VIN=5V、Rset=30KΩ；吸入 2mA 电流 | typ 0.2 · max 0.4 V | 3 |
| 功率开关管导通电阻 Ron | TA=25℃、VIN=5V、Rset=30KΩ；Iout=500mA | min 40 · typ 70 · max 110 mΩ | 3 |
| 限流门限 Iset | TA=25℃、VIN=5V、Rset=30KΩ | min 1.7 · typ 2 · max 2.4 A | 3 |
| VOUT 对地短路电流 Ishort | TA=25℃、VIN=5V、Rset=30KΩ；相对于 Iset | min 40 · typ 54 · max 65 % | 3 |
| 欠压锁定电压（具有迟滞特性） Vuvlo | TA=25℃、Rset=30KΩ；VIN 上升阶段 | min 1.9 · typ 2.35 · max 2.7 V | 3 |
| 欠压锁定电压（具有迟滞特性） Vuvlo | TA=25℃、Rset=30KΩ；VIN 下降阶段 | min 1.7 · typ 2.15 · max 2.5 V | 3 |
| 过温保护门限（具有迟滞特性） Tsd | VIN=5V、Rset=30KΩ；升温 | typ 145 ℃ | 3 |
| 过温保护门限（具有迟滞特性） Tsd | VIN=5V、Rset=30KΩ；CH217K 降温 | typ 130 ℃ | 3 |
| 从检测到故障到 FLAG#引脚输出有效 Tdly | TA=25℃、VIN=5V、Rset=30KΩ | min 4 · typ 7 · max 11 mS | 3 |
Pins, by the datasheet
6- 1 VOUT
- 电源输出，通常连接 USB 端口 VBUS。 · p. 2
- 2 GND
- 公共接地端。 · p. 2
- 3 FLAG#
- 过流或过温报警开漏输出，低电平有效。 · p. 2
- 4 EN#
- 电源开关使能输入，低电平有效，高电平关机。 · p. 2
- 5 ISET
- 限流门限设置，外接电阻 Rset 到 GND 设置 Iset。 · p. 2
- 6 VIN
- 电源输入，建议外接电容 10uF 或以上。 · p. 2
Ordering codes, by the datasheet
1- CH217K
- SOT23-6 · 400mA～2.7A programmable current limit; active-low EN#; typical thermal restart threshold 130℃. · p. 1
- 2 layers80 × 50 mm
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Questions
Is there a KiCad symbol and footprint for the CH217K?
Yes. The symbol is EasyEDA_Cloud:CH217K and the footprint Package_TO_SOT_SMD:SOT-23-6, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the CH217K?
SOT-23-6, with 6 pins. Its footprint is drawn on this page.
Where is the CH217K datasheet?
WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.
Where can I order the CH217K?
JLCPCB lists it as part C7462749, with 0 in stock; the sellers' links on this page open their listings.
What can replace the CH217K?
Parts like it in the library: the TPS22918DBV by Texas Instruments, the TPS2553DBV by Texas Instruments, the AP2553W6 by Diodes Incorporated and the TPS27081ADDC by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the CH217K?
29 boards in 16 repositories on GitHub; the most starred are listed on this page, with their KiCad files.