0
ACTIVE
Input voltage type |
DC/DC |
Topology |
Boost, current mode |
Vin (min) (V) |
2.5 |
Vin (max) (V) |
5.5 |
Vout (max) (V) |
5.5 |
Vout (min) (V) |
2.5 |
Iout (max) (A) |
1.5 |
Iq (typ) (mA) |
0.75 |
Features |
Input/Output Isolation, OVP, Over Current Protection, Synchronous Rectification |
Operating temperature range (°C) |
-40 to 85 |
Dimming method |
Analog, PWM |
Number of channels |
1 |
Rating |
Catalog |
DSBGA (YZR)-9-3.0625 mm² 1.75 x 1.75
The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.
The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.
The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.
WELL LINK CHIPS GROUP CO.,LIMITED FLAT/RM 1802 BEVERLY HOUSE 93-107 LOCKHART ROAD WANCHAI HK
