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LM3532TMX-40A/NOPB
High Efficiency White LED Driver with Programmable Ambient Light Sensing Capability and I2C Compati
VOUT up to 40V
VIN SW OVP
ILED1
ILED2
ILED3
PGND
ALS2
ALS1
INT
Ambient Light
Sensor 1
Ambient Light
Sensor 2
VALS
VIN
HWEN
SDA
SCL
LM3532COUTCIN D1
PWM1
PWM2T0 device is programmable over anI C-compatible 256 Level Logarithmic and Linear Brightness interface and has independent current control forall
three channels. The adaptive current regulationControl With 14-Bit Equivalent Dimming
method allows for different LED currents in each•I2 C-Compatible Interface current sink thus allowing fora wide variety of• Direct Read Backof Ambient Light Sensor Via backlight and keypad applications.8-bit ADC The main features of the LM3532 include dual• Programmable Dual Ambient Light Sensor Inputs ambient light sensor inputs each with 32 internalWith Internal Sensor Gain Selection voltage setting resistors, 8-bit logarithmic and linear Dual External PWM Inputs for LED Brightness brightness control, dual external PWM brightness
control inputs, and upto 1000:1 dimming ratio withAdjustment
programmable fadein and fade out settings.• Independent Current String Brightness Control
The LM3532is availableina 16-pin, 0.4-mm pitch• Programmable LED Current Ramp Rates
thin DSBGA package. The device operates overa• 40-V Overvoltage Protection 2.7-Vto 5.5-V input voltage range and the −40°Cto• 1-A Typical Current Limit +85°C temperature range.
Applications Device Information(1)• Power Sourcefor White LED Backlit LCD Displays• Programmable Keypad Backlight
(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Circuit
