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参数资料
| 型号： | TSM1012IDT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | MINISO-8 |
| 文件页数： | 6/8页 |
| 文件大小： | 119K |
| 代理商： | TSM1012IDT |
TSM1012
6/8
The current-control trans-conductance operation-
al amplifier can be fully compensated. Both of its
output and negative input are directly accessible
for external compensation components.
An example of a suitable compensation network is
shown in Fig.2. It consists of a capacitor
Cic1=2.2nF and a resistor Ric1=22K
in series.
3. Start Up and Short Circuit Conditions
Under start-up or short-circuit conditions the
TSM1012 is not provided with a high enough sup-
ply voltage. This is due to the fact that the chip has
its power supply line in common with the power
supply line of the system.
Therefore, the current limitation can only be en-
sured by the primary PWM module, which should
be chosen accordingly.
If the primary current limitation is considered not to
be precise enough for the application, then a suffi-
cient supply for the TSM1012 has to be ensured
under any condition. It would then be necessary to
add some circuitry to supply the chip with a sepa-
rate power line. This can be achieved in numerous
ways, including an additional winding on the trans-
former.
4. Voltage clamp
The following schematic shows how to realize a
low-cost power supply for the TSM1012 (with no
additional windings).Please pay attention to the
fact that in the particular case presented here, this
low-cost power supply can reach voltages as high
as twice the voltage of the regulated line. Since
the Absolute Maximum Rating of the TSM1012
supply voltage is 28V. In the aim to protect he
TSM1012 against such how voltage values a in-
ternal zener clamp is integrated.
Rlimit = (Vcc-Vz)Ivz
Figure 4 : Clamp voltage
Figure 5 :
Vz
28V
Vcc
Rlimit
cc
Ivz
TSM1012
Rsense
C2
R2
R1
C1
C3
optocoupler
secondary side
Cic1
2,2nF
Cvc1
2,2nF
Ric1
22K
Rvc1
22K
Rlimit
R4
R5
R3
D1
D2
OUT+
OUT-
Ric2
1K
PWM
controller
optocoupler
primary side
TSM1012
28V
Vref
Vcc
CC
CC-
CC+
Gnd
CV
CV-
CV+
Out
1,25V
3
4
8
5
1
7
2
6
C4
47nF
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| TSM1012IST | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSM1012IST | 功能描述:电池管理 Lo consumption Vltg Current Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TSM1013 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Constant Voltage and Constant Current Controller for Battery Chargers and Adaptors |
| TSM1013AI | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Constant Voltage and Constant Current Controller for Battery Chargers and Adaptors |
| TSM1013AID | 功能描述:电池管理 Constant Vltg Current Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TSM1013AIDT | 功能描述:开关变换器、稳压器与控制器 Voltage/Current Cont RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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