- 您现在的位置：买卖IC网 > PDF目录69535 > TSM111CD (STMICROELECTRONICS) POWER SUPPLY SUPPORT CKT, PDSO20 PDF资料下载
参数资料
| 型号： | TSM111CD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封装： | MICRO, PLASTIC, SO-20 |
| 文件页数： | 5/17页 |
| 文件大小： | 790K |
| 代理商： | TSM111CD |
TSM111
13/17
EVALUATION BOARD - TECHNICAL NOTE
TSM111 is a Housekeeping IC which is best used
in PC Switch Mode Power Supplies for secondary
3.3V, 5V, and 12V power lines protection.
TSM111 integrates all the necessary functions for
a secure and reliable overcurrent and overvoltage
protection, as well as a logic interface for proper
communication with the motherboard and adjust-
able timing circuitry for optimized sequencing
management. Moreover, TSM111 integrates two
precise shunt voltage references for direct opto-
coupler drive. TSM111, integrating the equivalent
of more than 25 discrete components, saves a lot
of design time and fine tuning, as well as PCB ar-
ea, and increases the reliability of the whole appli-
cation.
How to use the TSM111 Evaluation Board ?
This evaluation board allows to adapt the TSM111
housekeeping chip to an already existing PC Pow-
er Supply by simply choosing proper values for it’s
external components, and making the adequate
connections to the I/O of the evaluation board.
The Electrical Schematic of the TSM111 evalua-
tion board is shown on figure 1. It includes the
TSM111 as well as the minimum component num-
ber required to make the TSM111 fit in a PC
SMPS application.
Components calculations
The overvoltage protection is not to be adjusted.
Internal voltage thresholds are given by Vvs1,
Vvs2, Vvs3 for respective protection of the 3.3V,
5V, 12V power lines.
The overcurrent protection is given by the choice
of the Sense resistors R1, R2, R3 (respectively for
each power line 3.3V, 5V, 12V). Internal precise
voltage thresholds define the tripping voltage
drops for each line following equations 1, 2 & 3 :
Vcs1 = R1 x I33
eq1
Vcs2 = R2 x I5
eq2
Vcs3 = R3 x I12
eq3
where I33, I5, and I12 are the tripping currents.
The system will latch (Fault output will be active -
high) if the overcurrent lasts more than the autho-
rized surge delay Tsur given by equations 4 & 5 :
Icharge = Vcc / R4
eq4
Tsur = (C1 x Vsur) / Icharge
eq5
Note that eq4 is an approximation of a capacitive
charge where Vcc (16V min) is large versus the
threshold voltage Vsur (2.5V).
R4=33k
, C1=4.7F => Tsur=21ms
Thanks to the Tsur adjustment, the normal surge
currents which occur during power up (capacitive
oads charging) are blanked for a time depending
on each application.
Vs
33
1
Is3
3
20
Is5
1
9
Vs
5
2
Is1
2
18
Vs
12
3
Vr
ef
M
a
in
14
Fb
ma
in
15
Vr
ef
Aux
13
Fb
A
u
x
12
PG
9
Tpor
10
Rem
7
TRe
m
8
Adj
4
Gnd
16
Vc
c
5
UV
11
Tsur
17
PWM
6
U1
TSM111
R1
rs3.3V
R2
rs5V
R3
rs12V
D1
UV
R4
Rsur
C1
Csur
C2
Crem
R5 R rem
C3
Cpor
R6
1
2
J1
Vdet
1
2
J2
Fault
1
2
J3
Optaux
1
J5
In3.3V
1
J6
1
J7
In3.3V
Vdet
Optaux
Fault
In5V
In12V
Out12V
Out5V
Out3.3V
1
J8
Out12V
1
J9
Out5V
1
J10
Out3.3V
PG
1
2
J11
PG
1
2
3
4
SW1
BP Rem
1
2
J12
Rem
From c
5Vstby
1
2
J13
Vcc
1
2
J14
Gnd
VCC
1
2
J15
VrefMain
R7
RoptMain
VrefAux
R8
R9
Roptaux
C4
C5
1
2
J16
VrefAux
R10
1
2
J20
D5
D6
I
1INV
1
2
J18
OptMain
Vin
2
GN
D
1
Vout
3
U2 78L05
5Vstby
+
C7
R11
5Vstby
In5V
IN12V
EVALUATION BOARD - ELECTRICAL SCHEMATIC
C6
相关PDF资料 |
PDF描述 |
|---|---|
| TSM1121CDT | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| TSM1121ID | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| TSM1121IDT | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| TSM121C | 0.05 A DUAL SWITCHING CONTROLLER, 140 kHz SWITCHING FREQ-MAX, PDIP24 |
| TSP9125PWR | SWITCHING REGULATOR, PDSO14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TSM111CDT | 功能描述:监控电路 Triple Volt/Curr Sup RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TSM111CN | 功能描述:监控电路 Triple Volt/Curr Sup RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TSM111D | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TRIPLE VOLTAGE AND CURRENT SUPERVISOR |
| TSM111N | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TRIPLE VOLTAGE AND CURRENT SUPERVISOR |
| TSM112 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V 5V 12V HOUSEKEEPING IC |
发布紧急采购，3分钟左右您将得到回复。