参数资料
| 型号： | ICL7662CPA |
| 厂商： | Intersil |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP DBL INV 8DIP |
| 标准包装： | 2,000 |
| 类型： | 切换式电容器（充电泵），倍增器，反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -4.5 V ~ -20 V，9 V ~ 38.6 V |
| 输入电压： | 4.5 V ~ 20 V |
| 频率 - 开关： | 10kHz |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 散装 |
| 供应商设备封装： | 8-PDIP |
ICL7662
V+
Again, a low ESR capacitor will result in a higher
performance output.
10 μ F
C 1
+
-
1
2
3
4
ICL7662
8
7
6
5
R O
V OUT
Paralleling Devices
Any number of ICL7662 voltage converters may be
paralleled (Figure 18) to reduce output resistance. The
reservoir capacitor, C 2 , serves all devices while each device
16A.
10 μ F
-
+
V OUT = -V+
C 2
-
V+
+
16B.
requires its own pump capacitor, C 1 . The resultant output
resistance would be approximately:
R OUT (of ICL7662)
R OUT =
n (number of devices)
FIGURE 16. SIMPLE NEGATIVE CONVERTER AND ITS
V RIPPLE ? ? ----------------------------------------- + 2 ESRC 2 × I OUT ?
PUMP × C 2
OUTPUT EQUIVALENT
Output Ripple
ESR also affects the ripple voltage seen at the output. The
total ripple is determined by 2V, A and B, as shown in Figure
16. Segment A is the voltage drop across the ESR of C 2 at
the instant it goes from being charged by C 1 (current flowing
into C 2 ) to being discharged through the load (current
flowing out of C 2 ). The magnitude of this current change is 2
x I OUT , hence the total drop is 2 x I OUT x ESRC 2 V.
Segment B is the voltage change across C 2 during time t 2 ,
the half of the cycle when C 2 supplies current the load. The
drop at B is I OUT x t 2 /C 2 V. The peak-to-peak ripple voltage
is the sum of these voltage drops:
1
? 2 × f ?
t 2
B
0
Cascading Devices
The ICL7662 may be cascaded as shown in Figure 19 to
produce larger negative multiplication of the initial supply
voltage. However, due to the finite efficiency of each device,
the practical limit is 10 devices for light loads. The output
voltage is defined by:
V OUT = -n(V IN ),
where n is an integer representing the number of devices
cascaded. The resulting output resistance would be
approximately the weighted sum of the individual ICL7662
R OUT values.
t 1
V
A
-(V+)
FIGURE 17. OUTPUT RIPPLE
V+
1
8
2
ICL7662
7
1
8
C 1
3
4
“1”
6
5
C 1
2
3
ICL7662
“N”
7
6
R L
4
5
+ 2
-
C
FIGURE 18. PARALLELING DEVICES
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICL7662CPA+ | 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 |
| ICL7662EBA | 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 |
| ICL7662EBA+ | 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 |
| ICL7662EBA+T | 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 |
| ICL7662EBA-T | 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 |
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