MAX8645X - 1x/1.5x/2x White LED Charge Pumps

Maxim Integrated (now Analog Devices)

Datasheet Details

Part number	MAX8645X
Manufacturer	Maxim Integrated (now Analog Devices)
File Size	238.05 KB
Description	1x/1.5x/2x White LED Charge Pumps
Datasheet	MAX8645X Datasheet

The MAX8645X/MAX8645Y charge pumps drive up to eight white LEDs with regulated constant current for uniform intensity.

The main group of LEDs (M1–M6) can be driven up to 30mA per LED for backlighting.

The flash group of LEDs (F1 and F2) is independently controlled and can be driven up to 200mA per LED (or 400mA total).

19-3978; Rev 3; 12/06 KIT ATION EVALU E L B AVAILA 1x/1.5x/2x White LED Charge Pumps with Two LDOs in 4mm x 4mm.

Power Up to Eight LEDs Up to 30mA/LED Drive for Backlight Up to 400mA Total Drive for Flash.
Two Internal Low-Noise 200mA LDOs.
94% Max/85% Avg Efficiency (PLED/PBATT) over Li+ Battery Discharge.
0.2% Typical LED Current Matching.
Adaptive 1x/1.5x/2x Mode Switchover.
Flexible Brightness Control Single-Wire, Serial-Pulse Interface (32 Steps) 2-Bit Logic (Three Levels).
Thermal TA Derating Function.
Low Input Ripple and EMI.

Part Number	Description
MAX8645Y	1x/1.5x/2x White LED Charge Pumps
MAX8640Y	4MHz/2MHz Synchronous Step-Down DC-DC Converters
MAX8640Z	4MHz/2MHz Synchronous Step-Down DC-DC Converters
MAX8643	2MHz Step-Down Regulator
MAX8643A	2MHz Step-Down Regulator
MAX8646	2MHz Step-Down Regulator
MAX8647	(MAX8647 / MAX8648) Ultra-Efficient Charge Pumps
MAX8648	(MAX8647 / MAX8648) Ultra-Efficient Charge Pumps
MAX8649	1.8A Step-Down Regulator
MAX8600	Single-/Dual-Input 1-Cell Li Chargers