TSM101C STMICROELECTRONICS [STMicroelectronics], TSM101C Datasheet

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TSM101C

Manufacturer Part Number
TSM101C
Description
VOLTAGE AND CURRENT CONTROLLER
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

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DESCRIPTION
The TSM101/TSM101Aintegrated circuit incorpo-
rates a high stability series band gap voltage refer-
ence, two ORed operational amplifiers and a
current source.
This IC compares the DC voltage and the current
level at the output of a switching power supply to
an internal reference. It provides a feedback
through an optocoupler to the PWM controller IC in
the primary side.
The controlled current generator can be used to
modify the level of current limitation by offsetting
the information coming from the current sensing
resistor.
APPLICATIONS
This circuit is designed to be used in battery charg-
ers with a constant voltage and a limited output
current.
It can be used in every types of applicationrequiring
a precision voltage regulation and current limita-
tion.
Other applications include voltage supervisors,
over voltage protection...
.
.
.
.
.
June 1999
1.24V SERIES VOLTAGE REFERENCE WITH
10mA OUTPUT CURRENT AND 1% PRECI-
SION (TSM101A)
TWO OPERATIONAL AMPLIFIERS WITH
ORED OUTPUT AND 1MHZ GAIN BAND-
WIDTH PRODUCT
BUILT-IN CURRENT GENERATOR WITH EN-
ABLE/DISABLE FUNCTION
4.5 TO 32V SUPPLY VOLTAGE RANGE
SO8, DIP8 AND TSSOP8 PACKAGES
VOLTAGE AND CURRENT CONTROLLER
ORDER CODES
PIN CONNECTIONS
TSM101C/AC
TSM101I/AI
Part Number
1
2
3
4
(Plastic Package)
(Thin Shrink Small Outline Package)
DIP8
N
Temperature
-40, +105
-20, +80
Range
TSSOP8
Vref
P
o
o
C
C
(Plastic Micropackage)
TSM101/A
N
SO8
Package
D
D
8
7
6
5
P
1/15

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TSM101C Summary of contents

Page 1

... Other applications include voltage supervisors, over voltage protection... June 1999 TSM101/A N DIP8 SO8 (Plastic Package) (Plastic Micropackage) P TSSOP8 (Thin Shrink Small Outline Package) ORDER CODES Package Temperature Part Number Range N o TSM101C/AC -20, + TSM101I/AI -40, +105 C PIN CONNECTIONS Vref ...

Page 2

... OPERATING CONDITIONS Symbol V Supply Voltage CC T Operating Free Air Temperature Range oper ELECTRICAL CHARACTERISTICS 15V (unless otherwise specified) amb CC OPERATIONAL AMPLIFIER : TSM101C/I/AC/AI Symbol Parameter I Total Supply Current CC V Input Voltage Range i V Input Offset Voltage io I Input Bias Current ...

Page 3

... V < 32V 3 TSM101AC Min. Typ. Max 1.227 1.24 1.252 amb. <T <T 30 100 amb. max. < 10mA 5 15 out 5 < V < 32V 3 TSM101C/AC Min. Typ. Max. 1.4 <T <T 500 amb. max. < 32V 0.003 0.03 CC <T <T 0.6 amb. max. <T <T 2 amb. max. <T <T 30 amb. max <T <T ...

Page 4

TSM101/A 1 Vre f 4 Gnd 7 Vrin Crre f 5 Crin DESCRIPTION Name Pin Type V 1 OUTPUT ref V 7 INPUT rin C 5 INPUT rin C 3 INPUT rref C 2 INPUT ...

Page 5

A BATTERY CHARGER USING THE TSM101 This technical note shows how to use the TSM101 integrated circuit with a switching mode power supply (SMPS) to realize a battery charger. An example of realization of a 12V Nickel-cadmium battery charger is ...

Page 6

TSM101/A Figure 2 : SMPS Using a TL431 as Voltage Controller The optocoupler current increases and tends to reduce the output voltage by the way of the PWM controller. By enabling the TSM101 current source (pin possible ...

Page 7

The current regulation is effective when the voltage drop across R5 is equal to the voltage on pin 5 of the TSM101 (assuming that the internal current source is disabled). For medium currents (<1A), a voltage drop across R5 of ...

Page 8

TSM101 IMPROVEMENT 5.1. High frequency compensation Two R-C devices ( & R10 + C3) are used to stabilize the regulation at high frequencies. The calculation of these values is not easy and is a function of ...

Page 9

Higher Precision for the Voltage Control The voltage drop through the sense resistor R5 offsets the voltage measurement. In most battery charging applications, this offset is not taken into account because the error is negligeable com- pared to the ...

Page 10

TSM101/A charging conditions, then the following calculations apply : Current Control : Ich1 = 0.1 / 0.8 = 0.125 R5 = 125m V5 = Vref (R2 + R3) with ...

Page 11

EVALUATION BOARD - TECHNICAL NOTE TSM101 integrates in the same 8 pin DIP or SO package one 1.24V precision voltage reference two operationnal amplifiers two diodes which impose a NOR function on the outputs of the operationnal amplifiers one current ...

Page 12

TSM101/A The current control is given by the choice of the voltage drop through the sense resistor R5 (to be linked to the nominal current of the application) and by the value of the sense resistor itself. For medium currents ...

Page 13

PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP Millimeters Dim. Min. Typ. A 3.32 a1 0.51 B 1.15 b 0.356 b1 0.204 D E 7.95 e 2.54 e3 7. 3.18 Z Inches Max. Min. Typ. ...

Page 14

TSM101/A PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) Millimeters Dim. Min. Typ 0 0.65 b 0.35 b1 0. 4.8 E 5.8 e 1.27 e3 3.81 F 3.8 L 0.4 M ...

Page 15

PACKAGE MECHANICAL DATA 8 PINS -THIN SHRINK SMALL OUTLINE PACKAGE Millimeters Dim. Min. Typ 0.05 A2 0.80 1.00 b 0.19 c 0.09 D 2.90 3.00 E 6.40 E1 4.30 4. 0.50 0.60 ...

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