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参数资料
| 型号： | MAX1579ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC PS BIAS/WHITE LED TFT 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | LCD 显示器 |
| 电流 - 电源： | 3mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
Complete Bias and White LED Power Supplies
for Small TFT Displays
Typical Operating Characteristics (continued)
(Circuit of Figure 3, V IN = 3.6V, I LED = 20mA, 4 LEDs, CTRL = IN, T A = +25 ° C, unless otherwise noted.)
0
-0.1
MAIN OUTPUT LOAD REGULATION
0
-0.5
-1.0
POS AND NEG LOAD REGULATION
-0.2
-0.3
-0.4
-0.5
-0.6
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
NEG
POS
0
5
10
15
20
25
0
20
40
60
80
100
LOAD CURRENT (mA)
LOAD CURRENT ( μ A)
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
NAME
MAIN
CU1
CU2
CU3
POS
PMP
PMPB
CD1
CD2
NEG
FUNCTION
LDO Output and the POS and NEG Charge-Pump Inputs. V MAIN is regulated to 5V. Bypass to GND
with a 1μF capacitor. Output is internally discharged with a 1k Ω resistor when V ONBIAS = 0V.
POS Charge-Pump Capacitor Connection 1. Connect a 1μF capacitor between CU1 and PMP.
POS Charge-Pump Capacitor Connection 2. Connect a 1μF capacitor between CU2 and PMPB.
POS Charge-Pump Capacitor Connection 3. Connect a 1μF capacitor between CU3 and GND.
Output of Positive (3x) Charge Pump. Bypass POS to GND with a 1μF capacitor. POS is internally
discharged with a 3k Ω resistor when V ONBIAS = 0V.
Charge-Pump Capacitor Connection. Connect a 1μF capacitor between PMP and CU1 and another
1μF capacitor between PMP and CD1.
Charge-Pump Capacitor Connection. Connect a 1μF capacitor between PMPB and CU2 and another
1μF capacitor between PMPB and CD2. PMPB is 180 ° out of phase with PMP.
NEG Charge-Pump Capacitor Connection 1. Connect a 1μF capacitor and a 200 Ω ±5% resistor in
series between CD1 and PMP.
NEG Charge-Pump Capacitor Connection 2. Connect a 1μF capacitor and a 200 Ω ±5% resistor in
series between CD2 and PMPB.
Output of Inverting (-2x) Charge Pump. Bypass NEG to GND with a 1μF capacitor. Output is internally
discharged with a 1.5k Ω resistor when V ONBIAS = 0V.
6
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