0
ACTIVE
Number of channels |
3 |
Vin (min) (V) |
2.7 |
Vin (max) (V) |
5.5 |
Vout (min) (V) |
0 |
Vout (max) (V) |
40 |
Type |
Inductive |
Switching frequency (max) (kHz) |
500 |
Duty cycle (max) (%) |
94 |
LED current per channel (mA) |
30 |
Peak efficiency (%) |
89 |
Topology |
Boost |
Features |
OVP |
Operating temperature range (°C) |
-40 to 125 |
Rating |
Catalog |
DSBGA (YFQ)-16-3.24 mm² 1.8 x 1.8
The LM3532 is a 500-kHz fixed frequency asynchronous boost converter which provides the power for 3 high-voltage, low-side current sinks. The device is programmable over an I2C-compatible interface and has independent current control for all three channels. The adaptive current regulation method allows for different LED currents in each current sink thus allowing for a wide variety of backlight and keypad applications.
The main features of the LM3532 include dual ambient light sensor inputs each with 32 internal voltage setting resistors, 8-bit logarithmic and linear brightness control, dual external PWM brightness control inputs, and up to 1000:1 dimming ratio with programmable fade in and fade out settings.
The LM3532 is available in a 16-pin, 0.4-mm pitch thin DSBGA package. The device operates over a 2.7-V to 5.5-V input voltage range and the −40°C to +85°C temperature range.
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