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参数资料
| 型号： | TC962COE713 |
| 厂商： | Microchip Technology |
| 文件页数： | 5/12页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP INV 16SOIC |
| 标准包装： | 1,000 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -3 V ~ -18 V |
| 输入电压： | 3 V ~ 18 V |
| 频率 - 开关： | 12kHz ~ 24kHz |
| 电流 - 输出： | 80mA |
| 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： | 16-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SOIC |
TC962
3.0
3.1
APPLICATIONS INFORMATION
Theory of Operation
current source and double the frequency. This will
double the charge current going into the internal
capacitor, as well as any capacitor added to pin 7.
The TC962 is a capacitive pump (sometimes called a
switched capacitor circuit), where four MOSFET
switches control the charge and discharge of a
A Zener diode has been added to the TC962 for use as
a reference in building external regulators. This Zener
runs from pin 1 to ground.
capacitor.
3.2
Latch-Up
The functional block diagram shows how the switching
action works. SW1 and SW2 are turned on simulta-
neously, charging C P to the supply voltage, V IN . This
assumes that the on resistance of the MOSFETs in
series with the capacitor results in a charging time
(3 time constants) that is less than the on time provided
by the oscillator frequency as shown:
3 (R DS(ON) C P ) < C P /(0.5 f OSC )
In the next cycle, SW1 and SW2 are turned off and after
a very short interval of all switches being off (this
prevents large currents from occurring due to cross
All CMOS structures contain a parasitic SCR. Care
must be taken to prevent any input from going above or
below the supply rail, or latch-up will occur. The result
of latch-up is an effective short between V DD and V SS .
Unless the power supply input has a current limit, this
latch-up phenomena will result in damage to the
device. ( See AN763, Latch-up Protection for MOSFET
Drivers .)
690
conduction), SW3 and SW4 are turned on. The charge
in C P is then transferred to C R , but with the polarity
inverted . In this way, a negative voltage is now derived.
NC
1
2
8
7
I S
I L
V +
(+5V)
An oscillator supplies pulses to a flip-flop that is then
fed to a set of level shifters. These level shifters then
C P
+ 10 μ F
3
TC962
C OSC
R L
drive each set of switches at one-half the oscillator
frequency.
4
5
V OUT
(–5V)
The oscillator has two pins that control the frequency of
C R
+
10 μ F
oscillation. Pin 7 can have a capacitor added that is
returned to ground. This will lower the frequency of the
oscillator by adding capacitance to the timing capacitor
internal to the TC962. Grounding pin 6 will turn on a
Combined Negative Converter and Positive Multiplier
V+
FIGURE 3-1:
Test Circuit
Split V+ In Half
V+
1
2
8
7
V D1
1
2
8
7
2V –2V
C P2
+ 10 μ F 3
4
TC962 6
5
V OUT = –V +
V D2
C R1
+
V OUT =
+
10 μ F
D
C P
+ 10 μ F
3
4
TC962
6
5
C P1
+
+
10 μ F
C R
+
10 μ F
V OUT =
V +
2
Lowering Output Resistance by Paralleling Devices
Positive Voltage Multiplier
V+
V+
1
2
8
7
1
2
8
7
1
2
8
7
V D1
C P1
+ 10 μ F
3
4
TC962 6
5
C P2
+ 10 μ F
3
4
TC962 6
5
V OUT
3
4
TC962 6
5
C P
V D2
+ 10 μ F
C P
+
V OUT =
2V + –2V
10 μ F
D
FIGURE 3-2:
Typical Applications
? 2006 Microchip Technology Inc.
C R
+
10 μ F
DS21484C-page 5
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相关代理商/技术参数 |
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| TC962CPA | 功能描述:电荷泵 High Output 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 |
| TC962EOE | 功能描述:IC REG SWITCHED CAP INV 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
| TC962EPA | 功能描述:电荷泵 High Output 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 |
| TC962IJA | 功能描述:电荷泵 High Output 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 |
| TC962MJA | 功能描述:电荷泵 High Output 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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