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参数资料
| 型号： | MAX1574 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN |
| 中文描述： | 180mA、1倍/2倍、白光LED电荷泵，3mm x 3mm TDFN封装 |
| 文件页数： | 1/9页 |
| 文件大小： | 214K |
| 代理商： | MAX1574 |
General Description
The MAX1574 charge pump drives up to three white
LEDs with regulated constant current for uniform intensity.
By utilizing adaptive 1x/2x charge-pump modes and
very-low-dropout current regulators, it achieves 180mA
output drive capability and high efficiency over the 1-cell
lithium-battery input voltage range. Fixed-frequency
(1MHz) switching allows for tiny external components,
and the regulation scheme is optimized to ensure low EMI
and low input ripple.
The MAX1574 uses an external resistor to set the full-
scale 100% LED current. An enable input (EN) is used for
simple on/off control or can be pulsed repeatedly to set
lower LED current in multiple steps down to 5%. Once the
desired brightness is set, the MAX1574 maintains con-
stant LED current as long as EN is kept high. If EN is kept
low for more than 2ms, the MAX1574 enters shutdown.
The MAX1574 is available in a 10-pin 3mm x 3mm TDFN
package (0.8mm max height).
Applications
LCD Backlighting
Camera Strobes/Flashes and Movie Lights
Cell Phones/Smart Phones
PDAs, Digital Cameras, and Camcorders
Features
Up to 180mA (60mA/LED) Drive Capability
83% Average Efficiency (P
LED
/ P
BATT
) Over Li+
Battery Discharge
0.5% (typ) LED Current Matching
Adaptive 1x/2x Mode Switchover
Low Input Ripple and EMI
5% to 100% Dimming Through Single-Wire Serial
Pulse Interface
Low 0.1μA Shutdown Current
2.7V to 5.5V Supply Voltage Range
Soft-Start Limits Inrush Current
Output Overvoltage Protection
Thermal-Shutdown Protection
10-Pin 3mm x 3mm TDFN Package
M
180mA, 1x/2x, White LED Charge Pump
in 3mm x 3mm TDFN
________________________________________________________________
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
TOP VIEW
MAX1574
TDFN
3mm
×
3mm
10
9
8
7
O
G
L
L
6
L
1
2
3
4
I
E
C
C
5
S
Pin Configuration
Ordering Information
1
μ
F
1
μ
F
MAX1574
LED3
LED2
LED1
OUT
SET
EN
GND
IN
0.22
μ
F
CP
CN
2.7V TO 5.5V
ON/OFF AND
DIMMING
UP TO 180mA
Typical Operating Circuit
19-3117; Rev 0; 12/03
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX1574ETB
-40°C to +85°C
10 TDFN
3mm x 3mm
ABB
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| MAX1577YETA | 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1574EEE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1574ETB | 制造商:Maxim Integrated Products 功能描述:180MA, 1X/2X, WHITE LED CHARGE PUMP IN 3MM X - Rail/Tube |
| MAX1574ETB+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX1574ETB+T | 功能描述:LED照明驱动器 White LED 1x/2x 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 |
| MAX1574ETB-T | 功能描述:LED照明驱动器 White LED 1x/2x 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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