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参数资料
| 型号： | MAX1747EUP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC CHRG-PUMP TRPL TFTLCD 20TSSOP |
| 标准包装： | 74 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 2.7 V ~ 4.5 V |
| 输出数： | 3 |
| 输出电压： | 可调 |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
Triple Charge-Pump TFT LCD
DC-DC Converter
V IN = 3.0V
CIN
10 μ F
R7
100k
R FREQ
100k
C1
0.1 μ F
SUPM
IN
CXP
CXN
OUT
CX
0.47 μ F
V OUT
+5V, 200mA
RDY
SUPP
SUPN
C OUT
(2) 4.7 μ F
R1
150k
D3
C5
0.1 μ F
SHDN
C11
0.1 μ F
C12
0.1 μ F
R2
D4
DRVN
FB
49.9k
C6
1.0 μ F
D7
D8
C9
0.1 μ F
MAX1747
DRVP
C3
0.1 μ F
D1
V NEG
-7V, 10mA
C10
1.0 μ F
R5
280k
R6
49.9k
FBN
C7
0.1 μ F
D2
D5
D6
C4
1.0 μ F
V POS
REF
FBP
+12V, 5mA
CREF
0.22 μ F
TGND
GND
INTG
PGND
C INTG
1500pF
R4
49.9k
R3
432k
C8
1.0 μ F
Figure 1. Typical Application Circuit
(V POS ) and a negative output (V NEG ). These two out-
puts use external diode and capacitor stages (as many
stages as required) to regulate output voltages above
+35V and under -35V.
A proprietary regulation algorithm minimizes output rip-
ple as well as capacitor sizes for all three charge
pumps. Also included in the MAX1747 are a precision
1.25V reference that sources up to 50μA, shutdown,
power-up sequencing, fault detection, and an active-
low open-drain ready output.
Main Charge Pump
During the first half-cycle, the MAX1747 charges the
flying capacitor (CX) by connecting it between the sup-
ply voltage (V SUPM ) and ground (Figure 2). This initial
charge is controlled by the variable N-channel on-resis-
tance. During the second half-cycle, the MAX1747 level
shifts the flying capacitor by stacking the voltage
across CX on top of the supply voltage. This transfers
the sum of the two voltages to the output capacitor
(C OUT ).
Dual Charge-Pump Regulators
The MAX1747 contains two individual low-power
charge pumps. Using a single stage, the first charge
pump inverts the supply voltage (V SUPN ) and provides
a regulated negative output voltage. The second
charge pump doubles the supply voltage (V SUPP ) and
provides a regulated positive output voltage. The
MAX1747 contains internal P-channel and N-channel
MOSFETs to control the power transfer. The internal
MOSFETs switch at a constant frequency set by the
current into the shutdown pin (see Frequency Selection
and Shutdown ).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1747EUP+ | 功能描述:电荷泵 Triple Charge-Pump TFT LCD DC/DC Conv 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 |
| MAX1747EUP+T | 功能描述:电荷泵 Triple Charge-Pump TFT LCD DC/DC Conv 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 |
| MAX1747EUP-T | 功能描述:电荷泵 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 |
| MAX1747EVKIT | 功能描述:电源管理IC开发工具 MAX1747 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17480EVKIT+ | 功能描述:电源管理IC开发工具 MAX17480 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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