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参数资料
| 型号： | ICL7660SCBA-T |
| 厂商： | Intersil |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHD CAP DBL INV 8SOIC |
| 标准包装： | 2,500 |
| 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： | -1.5 V ~ -12 V，±3 V ~ ±24 V |
| 输入电压： | 1.5 V ~ 12 V |
| 频率 - 开关： | 10kHz，35kHz |
| 电流 - 输出： | 45mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
ICL7660S, ICL7660A
R L1
V OUT = V+ - V-
C 1
+
-
1
2
3
4
ICL7660S
ICL7660A
8
7
6
5
V+
D 1
-
+
C 3
V OUT = -V IN
50μF
2
+
50μF
-
+
-
1
2
3
ICL7660S
ICL7660A
8
7
6
V+
-
C 2
+
D 2
+
-
V OUT = (2V+) -
(V FD1 ) - (V FD2 )
C 4
R L2
50μF
+
-
4
5
V-
D 3
FIGURE 19. COMBINED NEGATIVE VOLTAGE CONVERTER
AND POSITIVE DOUBLER
Voltage Splitting
The bidirectional characteristics can also be used to split a
high supply in half, as shown in Figure 20. The combined
load will be evenly shared between the two sides, and a high
value resistor to the LV pin ensures start-up. Because the
switches share the load in parallel, the output impedance is
much lower than in the standard circuits, and higher currents
can be drawn from the device. By using this circuit, and then
the circuit of Figure 15, +15V can be converted, via +7.5 and
-7.5, to a nominal -15V, although with rather high series
output resistance ( ～ 250 Ω ).
FIGURE 20. SPLITTING A SUPPLY IN HALF
Regulated Negative Voltage Supply
In some cases, the output impedance of the ICL7660S and
ICL7660A can be a problem, particularly if the load current
varies substantially. The circuit of Figure 21 can be used to
overcome this by controlling the input voltage, via an
ICL7611 low-power CMOS op amp, in such a way as to
maintain a nearly constant output voltage. Direct feedback is
inadvisable, since the ICL7660S’s and ICL7660A’s output
does not respond instantaneously to change in input, but
only after the switching delay. The circuit shown supplies
enough delay to accommodate the ICL7660S and
ICL7660A, while maintaining adequate feedback. An
increase in pump and storage capacitors is desirable, and
the values shown provide an output impedance of less than
5 Ω to a load of 10mA.
Other Applications
Further information on the operation and use of the
ICL7660S and ICL7660A may be found in application note
+8V
50k
56k
50k
-
+8V
100 Ω
-
+
10μF
100k
ICL7611
+
1
8
ICL8069
100μF
+
-
2
3
ICL7660S
ICL7660A
7
6
4
5
V OUT
800k
250k
VOLTAGE
ADJUST
-
+
100μF
FIGURE 21. REGULATING THE OUTPUT VOLTAGE
11
FN3179.7
January 23, 2013
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相关代理商/技术参数 |
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| ICL7660SCBA-T137 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| ICL7660SCBAZ | 功能描述:电荷泵 ICL7660SCBA 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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