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| 型号： | MAX8631XETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），切换式电容器（充电泵） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
ATION
EVALU
AVAIL
19-3688; Rev 3; 6/08
KIT
ABLE
1x/1.5x/2x White LED Charge Pump with
Two LDOs in 4mm x 4mm Thin QFN
General Description
The MAX8631X/Y charge pump drives up to eight white
LEDs with regulated constant current for uniform inten-
sity. The main group of LEDs (M1–M4) can be driven
up to 30mA per LED for backlighting. The flash group
of LEDs (F1–F4) is independently controlled and can be
driven up to 100mA per LED (or 400mA total). Two
200mA LDOs are on-board to provide power for cam-
era functions. The LDOs’ output voltages are pin-pro-
grammable to meet different camera-module
requirements. By utilizing adaptive 1x/1.5x/2x charge-
pump modes and very-low-dropout current regulators,
the MAX8631X/Y achieves high efficiency over the full
1-cell lithium-battery voltage range. The 1MHz fixed-fre-
quency switching allows for tiny external components,
and the regulation scheme is optimized to ensure low
EMI and low input ripple.
The MAX8631X/Y is available in a 28-pin thin QFN,
4mm x 4mm lead-free package (0.8mm max height).
Applications
Camera Phones and Smartphones
Backlighting and Flash
PDAs, Digital Cameras, and Camcorders
Typical Operating Circuit
Features
? Powers Up to 8 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 (P LED /P BATT ) over Li+
Battery Discharge
? 0.2% Typical LED Current Matching
? Adaptive 1x/1.5x/2x Mode Switchover
? Single-Wire Serial Pulse Interface for Brightness
Control (32 Steps)
? Thermal T A Derating Function
? Low Input Ripple and EMI
? 2.7V to 5.5V Supply Voltage Range
? Soft-Start, Overvoltage, and Thermal-Shutdown
Protection
? 28-Pin Thin QFN, 4mm x 4mm Package
Ordering Information
1 μ F
1 μ F
PART
TEMP RANGE
PIN-PACKAGE
INPUT
2.7V TO 5.5V
10 μ F
C1P
PIN
IN
GND
PGND
C1N C2P
MAX8631X/Y
C2N
OUT
M1
M2
M3
OUTPUT
UP TO 480mA
10 μ F
MAIN
FLASH
MAX8631XETI+ -40°C to +85°C
MAX8631YETI+ -40°C to +85°C
*EP = Exposed pad.
+Denotes a lead-free package.
28 Thin QFN-EP*
4mm x 4mm (T2844-1)
28 Thin QFN-EP*
4mm x 4mm (T2844-1)
MAIN ON/OFF
AND DIMMING
FLASH ON/OFF
ENM1
ENM2
ENF
M4
F1
F2
F3
F4
DUAL-LDO ON/OFF
ENLDO
LDO1
CAMERA
DUAL-LDO
VOLTAGE
P1
LDO2
1 μ F
1 μ F
MODULE
SELECTION
P2
SETM
SETF
REF
0.01 μ F
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8631XEVKIT | 制造商:Maxim Integrated Products 功能描述:INTEGRATED DDR POWER-SUPPLY SOLUTIONS FOR DES - Bulk |
| MAX8631YETI+ | 功能描述:电荷泵 1x/1.5x/2x White LED Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX8631YETI+T | 功能描述:LED照明驱动器 1x/1.5x/2x White LED Charge Pump RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX8631YETI+TW | 功能描述:LED照明驱动器 1x/1.5x/2x White LED Charge Pump RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX8631YETI+W | 功能描述:LED照明驱动器 1x/1.5x/2x White LED Charge Pump RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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