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参数资料
| 型号： | MAX8631XETI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/15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： | 75 |
| 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： | 管件 |
| 工作温度： | -40°C ~ 85°C |
1x/1.5x/2x White LED Charge Pump with Two
LDOs in 4mm x 4mm Thin QFN
1 μ F
1 μ F
INPUT
2.7V TO 5.5V
C1P
PIN
C1N
C2P
C2N
LDO1
10 μ F
IN
GND
LDO2
1 μ F
1 μ F
OUTPUT
10 μ F
ENM2
MAX8631X
MAX8631Y
OUT
UP TO 240mA
MAIN
FLASH
ENM1
ON/OFF AND
VOLTAGE
SELECTION
ENF
ENLDO
P1
P2
M1
M2
M3
M4
F1
F2
F3
F4
SETM
SETF REFBP
PGND
6.81k Ω
4.12k Ω
0.01 μ F
Figure 5. Schematic for When Fewer than 8 LEDs Is Acceptable
Typical operating waveforms shown in the Typical
Operating Characteristics show input ripple current in
1x, 1.5x, and 2x mode.
Table 2. P1 and P2, LDO Output Voltage
Selection
LDO Output Voltage Selection (P1 and P2)
As shown in Table 2, the LDO output voltages, LDO1
P1
P2
MAX8631X
LDO1 (V) LDO2 (V)
MAX8631Y
LDO1 (V) LDO2 (V)
and LDO2 are pin-programmable by the logic states of
P1 and P2. P1 and P2 are tri-level inputs: IN, open, and
GND. The input voltage, V IN , must be greater than the
selected LDO1 and LDO2 voltages. The logic states of
P1 and P2 can be programmed only during ENLDO
low. Once the LDO_ voltages are programmed, their
values do not change by changing P1 or P2 during
ENLDO high.
Component Selection
Use only ceramic capacitors with an X5R, X7R, or better
IN
IN
IN
OPEN
OPEN
OPEN
GND
GND
GND
IN
OPEN
GND
IN
OPEN
GND
IN
OPEN
GND
3.3
3.0
2.8
3.3
2.6
2.6
3.0
2.8
2.5
1.8
1.5
1.5
1.5
1.8
1.5
1.8
1.8
1.8
2.8
2.8
2.9
2.6
2.6
2.8
2.9
2.9
2.9
2.6
2.8
1.5
1.9
2.6
1.9
1.8
1.9
2.9
dielectric. See Table 3 for a list of recommended parts.
Connect a 1μF ceramic capacitor between LDO1 and
GND, and a second 1μF ceramic capacitor between
LDO2 and GND for 200mA applications. The LDO out-
put capacitor ’s (C LDO ) equivalent series resistance
(ESR) affects stability and output noise. Use output
capacitors with an ESR of 0.1 Ω or less to ensure stability
and optimum transient response. Connect C LDO_ as
close to the MAX8631X/Y as possible to minimize the
impact of PC board trace inductance.
PC Board Layout and Routing
The MAX8631X/Y is a high-frequency switched-capaci-
tor voltage regulator. For best circuit performance, use
a solid ground plane and place C IN , C OUT , C3, and C4
as close to the MAX8631X/Y as possible. There should
be no vias on C IN . Connect GND and PGND to the
exposed paddle directly under the IC. Refer to the
MAX8631X/Y evaluation kit for an example.
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8631XETI+ | 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 |
| MAX8631XETI+G104 | 制造商:Maxim Integrated Products 功能描述:1X/1.5X/2X WHITE LED CHARGE PUMP WI - Rail/Tube |
| MAX8631XETI+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 |
| MAX8631XETI+TG104 | 制造商:Maxim Integrated Products 功能描述:1X/1.5X/2X WHITE LED CHARGE PUMP WI - Tape and Reel |
| MAX8631XETI+TW | 制造商:Maxim Integrated Products 功能描述:CHG PUMP STPUP 5V 580MA 28TQFN EP - Tape and Reel |
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