PMIC - LED Drivers

Image	Part Number	Description / PDF	Quantity	Rfq
	AS1111C-BDFT ams	IC LED DVR QUAD 40MA 8MLPD	0
	AS1121-BQFT ams	IC LED DRIVER LINEAR 40MA 32TQFN	0
	AS3823-ZQFT ams	IC LED DRIVER LINEAR DIM 32QFN	0
	AS3630-ZWLM ams	IC LED DRVR RGLTR DIM 8A 25WLCSP	0
	AS3821-ZLQT ams	IC LED DRIVER LINEAR DIM 44LQFP	0
	AS1390A-BQFT ams	IC LED DRIVER CONTROLLER 20QFN	0
	AS1109-BSSU ams	IC LED DRIVER LIN 100MA 16QSOP	0
	AS1122-BQFM ams	IC LED DRIVER LINEAR 40MA 24QFN	0
	AS3688 ams	IC LED DRIVER CTRLR/RGLTR 32QFN	0
	AS1123-BTST ams	IC LED DRIVER LINEAR 40MA 24QSOP	0
	AS3696-ZTQM ams	IC LED DRIVER CTRLR DIM 32TQFP	0
	AS3648-ZWLT ams	IC LED DRVR RGLTR DIM 1A 13WLCSP	0
	AS3682-T ams	IC LED DRIVER RGLTR 400MA 24QFN	0
	AS1103-T ams	IC LED DRVR LIN DIM 40MA SC70-6	0
	AS1112-BQFT ams	IC LED DRIVER LIN 100MA 32TQFN	0
	AS3691A-ZQFT ams	IC LED DRIVER LINEAR 400MA 24QFN	0
	AS3649-ZWLM ams	IC LED DRIVER RGLTR DIM 1A 16WLP	0
	AS3683 ams	IC LED DRIVER RGLTR 400MA 24QFN	0
	AS3636-ZWLT ams	IC LED DRIVER RGLTR DIM 16WLCSP	0
	AS3647-ZWLM ams	IC LED DRIVER REGULATOR 13WLCSP	0

PMIC - LED Drivers

1. Overview

Power Management Integrated Circuits (PMICs) with LED Driver functionality are specialized semiconductor devices designed to regulate and control light-emitting diodes (LEDs) in various applications. These drivers provide precise current control, dimming capabilities, and protection features to ensure optimal LED performance. Their importance in modern technology stems from the widespread adoption of LEDs in energy-efficient lighting, display backlights, and automotive systems due to their compact size, long lifespan, and low power consumption.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Constant Current (CC) Drivers	Maintain stable output current regardless of voltage variations	LED street lighting, industrial lighting systems
Constant Voltage (CV) Drivers	Regulate output voltage with current limiting protection	LED strips, architectural lighting
Multi-channel Drivers	Independent control of multiple LED strings with synchronization	RGB lighting, automotive ambient lighting
Dimming-capable Drivers	Support PWM or analog dimming with wide adjustment range	Smartphone displays, TV backlighting

3. Structure and Components

Typical PMIC LED Driver structure includes: - Semiconductor die with CMOS/Bipolar processes - Power MOSFETs for current regulation - Precision reference voltage circuits - Protection modules (OVP, OCP, OTP) - Control logic for dimming interfaces - Thermal management substrate Packaged in QFN, TSSOP, or WLCSP formats with 16-48 pins depending on channel count and power rating.

4. Key Technical Specifications

Parameter	Description	Importance
Input Voltage Range	4.5V to 40V typical operating range	Determines compatibility with power sources
Output Current Accuracy	2-5% regulation tolerance	Affects LED brightness consistency
Dimming Ratio	1000:1 (PWM) or 20:1 (analog)	Defines brightness control resolution
Efficiency	85-95% typical buck converter efficiency	Impacts thermal performance and battery life
Switching Frequency	200kHz-2MHz adjustable range	Affects EMI and component size

5. Application Areas

Major industries utilizing PMIC LED drivers include: - Consumer Electronics: Smartphones, tablets, TVs - Automotive: Headlights, interior lighting, display backlighting - Industrial: Factory automation lighting, emergency lighting - Medical: Surgical lighting, diagnostic equipment displays - Smart Home: IoT-enabled lighting systems

6. Leading Manufacturers and Products

Manufacturer	Product Family	Key Features
Texas Instruments	TLC59xx series	16-channel PWM control, 12-bit brightness adjustment
STMicroelectronics	LED81XX series	Automotive-grade, ASIL-B safety compliance
ON Semiconductor	Cat4xxx series	Low EMI spread spectrum technology
Infineon Technologies	IMC108 series	Integrated power MOSFETs, 3A per channel

7. Selection Guidelines

Key selection criteria: - Required output current/voltage specifications - Dimming method compatibility (PWM vs analog) - Number of independent channels needed - Package thermal performance requirements - Protection features (IP rating, fault reporting) - Compliance with industry standards (AEC-Q automotive grade) - Cost vs integration level trade-offs

8. Industry Trends

Emerging trends include: - Integration with wireless control (Bluetooth/Zigbee) - Higher integration with MCU cores on single die - Adaptive dimming using AI algorithms - Increased adoption of GaN transistors for higher efficiency - Miniaturization for wearable device applications - Enhanced thermal management solutions for automotive use cases