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| 型号： | TL7660CDRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 9 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 2/22页 |
| 文件大小： | 566K |
| 代理商： | TL7660CDRG4 |
www.ti.com
Output Ripple
A
B
0
V
t
2
t
1
–V+
Paralleling Devices
+
-
1
2
3
4
8
7
6
5
TL7660
"1"
1
2
3
4
8
7
6
5
TL7660
"n"
+
-
+
-
V+
C
1
C
2
R
L
C
1
CMOS VOLTAGE CONVERTER
SCAS794 – JUNE 2006
APPLICATION INFORMATION (continued)
ESR also affects the ripple voltage seen at the output. The total ripple is determined by two voltages, A and B,
as shown in Figure 4. Segment A is the voltage drop across the ESR of C2 at the instant it goes from being
charged by C1 (current flow into C2) to being discharged through the load (current flowing out of C2). The
magnitude of this current change is 2
× I
OUT, hence the total drop is 2 × IOUT × eSRC2 V. Segment B is the
voltage change across C2 during time t2, the half of the cycle when C2 supplies current to the load. The drop at
B is IOUT × t2/C2 V. The peak-to-peak ripple voltage is the sum of these voltage drops:
VRIPPLE ≈ (1/(2fPUMPC2) + 2(ESRC2)) × IOUT
Again, a low ESR capacitor results in a higher performance output.
Figure 4. Output Ripple
Any number of TL7660 voltage converters may be paralleled to reduce output resistance (see Figure 5). The
reservoir capacitor, C2, serves all devices, while each device requires its own pump capacitor, C1. The resultant
output resistance would be approximately:
ROUT = ROUT (of TL7660)/n (number of devices)
Figure 5. Paralleling Devices
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TL7660CP | 功能描述:电荷泵 CMOS Voltage Converter 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 |
| TL7660CP | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter IC 制造商:Texas Instruments 功能描述:IC, CMOS VOLTAGE CONVERTER, 8-DIP |
| TL7660CPE4 | 功能描述:电荷泵 CMOS Voltage Converter 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 |
| TL7660ID | 功能描述:电荷泵 CMOS Vltg Converter 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 |
| TL7660IDG4 | 功能描述:电荷泵 CMOS Vltg Converter 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 |
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