STP1612PW05TTR Integrated Circuits (ICs)

Voltage - Output:	20V
Base Part Number:	STP1612PW05
Supplier Device Package:	24-TSSOP
Package / Case:	24-TSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	30MHz
Current - Output / Channel:	60mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	3V
Number of Outputs:	16
Internal Switch(s):	Yes
Topology:	Shift Register
Type:	Linear
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

STP1612PW05TTR is a chip-based product from STMicroelectronics. It is a high-efficiency LED driver, targeted for use in portable, application specific LED lighting products. The feature-rich device is optimized for low output ripple, high transient efficiency and for operating directly from a single lithium-ion battery cell.

Application Field and Working Principle

STP1612PW05TTR is a highly integrated, cost-effective and reliable power management IC that is highly configurable, thanks to its low-ripple regulated charge pump and cold start regulation capability. It is designed to go in simple constant current LED lighting applications that require minimal programming and enable easy external configuration. The device works by charging the inductor current to a predetermined setpoint, which is then used as the LED current target. The LED current is then regulated with an error amplifier, where the target LED current is compared to a precise LED current regulation feedback loop. The device is suitable for powering LEDs from a Li-ion battery in mobile applications such as flashlights, smart watches, and personal navigational devices, as well as for embedded applications. It features two configurable constant current outputs for driving up to two strings of LEDs, each output providing a constant current of up to 280mA. Outputs can be configured for different industries, either for single-string operation or for driving two separate strings of LEDs. It also has a dedicated active low reset output to enable easy programming of the outputs. The device includes a soft start ramp up feature, which ensures a smooth startup at cold start and provides protection to the Li-ion battery and LEDs. To optimize system performance, the device also has configurable ripple control, adjustable frequency, and low-power consumption modes. In addition, the device can be asynchronously disabled with a single digital input to prolong battery life.

Conclusion

STP1612PW05TTR PMIC - LED Drivers is a highly integrated, cost-effective and reliable power management IC that is optimized for low output ripple, high transient efficiency, and for operating directly from a single lithium-ion battery cell. It is suitable for powering LEDs from a Li-ion battery in mobile applications such as flashlights, smart watches, and personal navigational devices, as well as for embedded applications. It features two configurable constant current outputs for driving up to two strings of LEDs, a dedicated active low reset output to enable easy programming of the outputs, soft start ramp up feature, configurable ripple control, adjustable frequency, and low-power consumption modes. It is designed to go in simple constant current LED lighting applications that require minimal programming and enable easy external configuration.

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