LP3936SLX

Voltage - Output:	5.3V
Base Part Number:	LP3936
Supplier Device Package:	32-TLGA (4.5x5.5)
Package / Case:	32-WFLGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight, Camera Flash
Dimming:	PWM
Frequency:	1MHz
Current - Output / Channel:	25mA, 120mA (Flash)
Series:	--
Voltage - Supply (Max):	6V
Voltage - Supply (Min):	3V
Number of Outputs:	9
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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The LP3936SLX is a versatile LED driver integrated circuit (IC) designed specifically to drive both individually addressable LEDs, and those configured in a low-side multiplexed format, while providing a wide range of features that are easily configured to meet the user’s application needs. It integrates a high-precision, low-power comparator, a precision reference, a low-side N-MOS switch, a charge pump, and two LED drivers. The LED drivers are designed to drive LED strings composed of two to 16 LEDs.The LP3936SLX is ideal for applications requiring multiple LEDs, such as LCD backlighting, front panel indicators, and RGB LED backlighting. It supports a wide range of operating voltages, from 2.5V to 26V, and is well suited for portable electronics, where a reduced power budget is critical. The LP3936SLX also supports a diode-OR input mode, simplifying the user configurable multi-input logic.

Application Fields

The LP3936SLX is designed to drive both individually addressable LEDs, and low-side multiplexed LEDs, making it an ideal solution for applications requiring multiple LEDs, such as LCD backlighting, front panel indicators, and RGB LED backlighting. It supports a wide range of operating voltages, from 2.5V to 26V, and is well suited for portable electronics, where a reduced power budget is critical.

Working Principle

The LP3936SLX integrates a high-precision, low-power comparator, a precision reference, a low-side N-MOS switch, a charge pump, and two LED drivers. The LED drivers are designed to drive LED strings composed of two to 16 LEDs. The LP3936SLX is configured to drive either individually addressable LEDs or a low-side multiplexed LED string.When driving individually addressable LEDs, the LP3936SLX operates by comparing an external voltage or current source to a programmable reference voltage, which is generated internally. When the external voltage or current rises above the reference voltage, the LP3936SLX activates the LED. The LED is deactivated when the external voltage or current drops below the reference voltage. This process is controlled by the LED drivers, which are capable of controlling up to 16 LEDs.When driving a low-side multiplexed LED string, the LP3936SLX operates by driving an external N-MOS switch. This switch is connected to the LED string and is activated when the external voltage or current rises above the programmable reference voltage. When the switch is activated, the LP3936SLX charges the LED string with a constant current. The current is then regulated by the LED drivers, which can control up to 16 LEDs.

Conclusion

The LP3936SLX is a versatile LED driver IC designed to drive both individually addressable LEDs and low-side multiplexed LEDs, while providing a wide range of features. It supports a wide range of operating voltages and is ideal for applications requiring multiple LEDs. The LP3936SLX is well-suited for portable electronics, where a reduced power budget is critical.

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