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參數資料
| 型號： | MAX1570 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump |
| 中文描述： | 白光LED電流調節(jié)器，帶有1倍/1.5倍高效率電荷泵 |
| 文件頁數： | 1/11頁 |
| 文件大?。?/td> | 358K |
| 代理商： | MAX1570 |
General Description
The MAX1570 fractional charge pump drives up to five
white LEDs with regulated constant current for uniform
intensity. The MAX1570 maintains the highest possible
efficiency over the full 1-cell lithium-ion (Li+) battery
input voltage range by utilizing a 1x/1.5x fractional
charge pump and very-low-dropout current regulators.
The MAX1570 operates with 1MHz fixed-frequency
switching, allowing for tiny external components. The
regulation scheme is optimized to ensure low EMI and
low input ripple.
An external resistor sets the full-scale LED current,
while two digital inputs control on/off and select
between three levels of brightness. A pulse-width mod-
ulation (PWM) signal can also be used to modulate LED
brightness.
The MAX1570 is available in 16-pin 4mm
4mm Thin
QFN packaging (0.8mm max height).
Applications
White LED Backlighting
Cell Phones and Smart Phones
PDA and Palmtop Computers
Portable MP3 Players
Digital Cameras and Camcorders
Features
o
Excellent 0.3% LED-to-LED Current Matching
o
30mA/LED Drive Capability
o
Proprietary 1x/1.5x Modes for Ultra-High
Efficiency
o
Low Input Ripple and EMI
o
Eliminates Ballast Resistors
o
Digital or PWM LED Dimming Control
o
0.1μA Shutdown Current
o
2.7V to 5.5V Supply Voltage Range
o
Soft-Start Limits Inrush Current
o
Thermal-Shutdown Protection
o
No External Inductor, Schottky, or Zener Diode
Required
o
Tiny 16-Pin 4mm
4mm Thin QFN Package
M
White LED Current Regulator with 1x/1.5x
High-Efficiency Charge Pump
________________________________________________________________
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
16
15
14
13
9
10
11
12
SET
EN1
PGND
C1N
4
3
2
1
LED5
GND
EN2
C1P
5
6
7
8
LED4
LED3
LED2 LED1
MAX1570
C2N
OUT
C2P
IN
THIN QFN
(4mm x 4mm)
Pin Configuration
Ordering Information
LED1
LED2
LED3
LED4
LED5
4.7
μ
F
PGND
GND
C1P
C1N C2P
C2N
1
μ
F
1
μ
F
EN1
EN2
SET
IN
RSET
1
μ
F
2.7V TO 5.5V
ON/OFF
AND
DIMMING
1x/1.5x
REGULATING CHARGE PUMP
REFERENCE
AND
CONTROL
LOW-DROPOUT
CURRENT
REGULATORS
MAX1570
OUT
Typical Operating Circuit
19-2526; Rev 0; 7/02
PART
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
16 Thin QFN
MAX1570ETE
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PDF描述 |
|---|---|
| MAX1575EVKIT | MAX1575 Evaluation Kit |
| MAX1575ETE | CAP 330UF 10V ELECT TG SMD |
| MAX1575 | White LED 1x/1.5x Charge Pump for Main and Sub-Displays |
| MAX1582 | High-Efficiency, 26V Step-Up Converter for White LED Main and Subdisplay Backlighting |
| MAX1582ETC | High-Efficiency, 26V Step-Up Converter for White LED Main and Subdisplay Backlighting |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1570ETE | 功能描述:LED照明驅動器 White LED Crnt Reg w/1-1.5x Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX1570ETE+ | 功能描述:LED照明驅動器 White LED Crnt Reg w/1-1.5x Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX1570ETE+T | 功能描述:LED照明驅動器 White LED Crnt Reg w/1-1.5x Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX1570ETE-T | 功能描述:LED照明驅動器 White LED Crnt Reg w/1-1.5x Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX1570ETE-TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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