ZHCSCQ7A August 2014 – November 2014 LM3643
PRODUCTION DATA.
PIN | DESCRIPTION | |
---|---|---|
NUMBER | NAME | |
A1 | GND | Input voltage connection. Connect IN to the input supply and bypass to GND with a 10-µF or larger ceramic capacitor. |
A2 | IN | Serial data input/output in the I2C Mode on LM3643. |
A3 | SDA | Drain Connection for Internal NMOS and Synchronous PMOS Switches. |
B1 | SW | Active high hardware flash enable. Drive STROBE high to turn on Flash pulse. Internal pulldown resistor of 300 kΩ between STROBE and GND. |
B2 | STROBE | Serial clock input for LM3643. |
B3 | SCL | Step-up DC-DC converter output. Connect a 10-µF ceramic capacitor between this terminal and GND. |
C1 | OUT | Active high enable pin. High = Standby, Low = Shutdown/Reset. Internal pulldown resistor of 300 kΩ between HWEN and GND. |
C2 | HWEN | Torch terminal input or threshold detector for NTC temperature sensing and current scale back. |
C3 | TORCH/TEMP | High-side current source output for flash LED. |
D1 | LED2 | Configurable dual polarity power amplifier synchronization input. Internal pulldown resistor of 300 kΩ between TX and GND. |
D2 | TX | High-side current source output for flash LED. |
D3 | LED1 |