Datasheet TSM102 Datasheet (SGS Thomson Microelectronics)



DUAL OPERATIONALAMPLIFIER - DUALCOMPARATOR

AND ADJUSTABLE VOLTAGE REFERENCE

OPERATIONALAMPLIFIERS

.

LOW SUPPLYCURRENT: 200µA/amp.

.

MEDIUMSPEED: 2.1MHz

.

LOW LEVEL OUTPUT VOLTAGECLOSE TO

-

V

: 0.1Vtyp.

CC

.

INPUTCOMMON MODE VOLTAGERANGE
INCLUDESGROUND

COMPARATORS

.

LOW SUPPLYCURRENT: 200µA/amp.

= 5V)

(V

CC

.

INPUTCOMMON MODE VOLTAGERANGE
INCLUDESGROUND

.

LOW OUTPUT SATURATIONVOLTAGE:
250mV (I

REFERENCE

.

ADJUSTABLEOUTPUT VOLTAGE :
V

ref

.

SINK CURRENTCAPABILITY :1 to 100mA

.

1%and 0.4%VOLTAGEPRECISION

.

LACTH-UP IMMUNITY

to 32V

= 4mA)

o

TSM102/A

N

DIP16

(Plastic Package)

D

SO16

(Plastic Micropackage)

ORDER CODES

Part number Temperature Range

o

TSM102I -40
TSM102AI -40

C, +85oC ••

o

C, +85oC ••

Package

ND

PIN CONNECTIONS

Output 1

1

Inverting Input 1

Non-inve rting Input 1

Non-inve rting Input 2

DESCRIPTION

The TSM102 is a monolithic IC that includes two
op-amps,twocomparatorsanda precisionvoltage
reference. This device is offering space and cost
savinginmanyapplicationslikepowersupplyman­agement or data acquisitionsystems.

February1999 1/10

Inverting Input 2

V

Output 2

Vref

2

3

+

CC

COMP

4

5

6

7

8

COMP

16

Output 4

Inverting Input

15

Non-inverting Input 4

14

V

-

13

CC

Non-inverting Input 3

12

Inverting Input 3

11

10

Output 3

9

Ca thode

TSM102

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

V

CC

V

id

V

T

oper

T

ELECTRICAL CHARACTERISTICS

+

V

CC

Symbol Parameter Min Typ Max Unit

I

CC

OPERATIONALAMPLIFIERS

+

=5V,VCC=GND, R1 connectedto V

V

CC

Symbol Parameter Min. Typ. Max. Unit

V

io

DV

io

I

ib

I

io

A

vd

SVR Supply Voltage Rejection Ratio

V

icm

CMR CommonMode Rejection Ratio

I

sc

V

OH

V

OL

SR Slew Rate

GBP Gain BandwidthProduct

∅m Phase Margin

THD Total Harmonic Distortion

e

n

C

s

Supply Voltage 36 V
Differential Input Voltage 36 V
Input Voltage -0.3 to +36 V

i

Operating Free-air Temperature Range -40 to +125
Maximum Junction Temperature 150

j

Thermal Resistance Juction toAmbient (SO package) 150

=5V,V

-

=0V,T

CC

amb

Total Supply Current

T

min.<Tamb<Tmax.

Input Offset Voltage

≤ T

T

min.

amb

≤ T

=25oC (unlessotherwisespecified)

CC/2,Tamb

max.

=25oC (unlessotherwise specified)

0.8 1.5
2

1 4.5

6.5
Input Offset VoltageDrift 10 µV/oC
Input Bias Current

≤ T

T

min.

amb

≤ T

max.

Input Offset Current

≤ T

T

min.

Large Signal Voltage Gain

R1 = 10k, V
T

min.

V

CC

≤ T

amb

max.

+

= 30V, Vo= 5V to 25V

CC

≤ T

≤ T

amb

max.

= 5V to 30V 80 100

Input Common Mode VoltageRange

≤ T

T

min.

+

V

CC

amb

= 30V, V

≤ T

max.

icm

=0Vto(V

CC

+

) -1.8V

50
25

(VCC-)to(V

-

)to(V

(V

CC

70 90 dB

CC

CC

+

) -1.8

+

) -2.2

20 100

200

52040nA

100 V/mV

Output Short Circuit Current

= ±1V, Vo= 2.5V

V

id

Source
Sink

High Level Output Voltage RL= 10kΩ

+

= 30V

V

CC

≤ T

T

min.

amb

≤ T

max.

Low Level Output Voltage RL= 10kΩ

≤ T

T

min.

amb

≤ T

max.

27
26

3
3

6
6

28

100 150

210

1.6 2 V/µs

= ±15V

V

CC

= ±10V, RL= 10kΩ,CL= 100pF

V

i

1.4 2.1 MHz

= 10kΩ,CL= 100pF, f = 100kHz

R

L

= 10kΩ,CL= 100pF 45

R

L

0.05

Equivalent Input Noise Voltage

f = 1kHz 29

Channel Separation 120 dB

o

Degrees

o

C

o

C

C/W

mV

nA

dB

mA

mV

%

nV

√Hz

mA

V

V

2/10

TSM102

COMPARATORS

+

=+5V,VCC=Ground, T

V

CC

Symbol Parameter Min. Typ. Max. Unit

V

I

I

I

OH

V

A

I

sink

V

V

t
t

Note 1 : The response time specified is for 100mV input step with 5mV overdrive.

Input Offset Voltage

io

Input Offset Current

io

Input Bias Current

ib

≤ T
≤ T

≤ T

amb

amb

amb

≤ T
≤ T

≤ T

T

min.

T

min.

T

min.

High Level Output Current

= 1V, VCC=Vo= 30V

V

id

≤ T

≤ T

amb

amb

sink

≤ T

≤ T

CC

T

min.

Low Level Output Voltage

OL

vd

= -1V, I

V

id

T

min.

Large Signal Voltage Gain

R1 = 15k, V

Output Sink Current

= -1V, Vo= 1.5V

V

id

Input Common Mode VoltageRange

icm

Differential Input Voltage V

id

Response Time - (note 1)

re

Large Signal Response Time

rel

For larger overdrive signals, 300ns can be obtained.

≤ T

T

min.

amb

≤ T

R1 = 5.1k to V

= 1.4V, Vi= TTL, R1 = 5.1k to V

V

ref

=25oC (unlessotherwise specified)

amb

max.

max.

max.

0.1

max.

= 4mA

max.

250 400

= 15V, Vo= 1 to 11V 200

616 mA

0
0

1.3 µs

300 ns

CC

max.

+

,V

ref

= 1.4V

CC

+

5
9

50

150
250

400

1

700

VCC+-1.5

+

-2

V

CC

+

CC

mV

nA

nA
nA

µA

mV

V/mV

V

V

3/10

TSM102

VOLTAGEREFERENCE

Symbol Parameter Value Unit

V

KA

I

K

ELECTRICAL CHARACTERISTICS

=25oC (unless otherwise specified)

T

amb

Symbol Parameter Min. Typ. Max. Unit

V

ref

V

∆

ref

V

∆

ref

∆T

∆

V

ref

∆V

KA

Iref Reference InputCurrent - (figure 2)

I

∆

ref

I

min

I

off

Cathode to Anode Voltage V

to 36 V

ref

Cathode Current 1 to 100 mA

Reference InputVoltage - (figure 1) - T

TSM102, V
TSM102A, V

KA=Vref,IK

KA=Vref,IK

= 10mA

= 10mA

amb

=25oC

2.475

2.490

2.500

2.500

2.525

2.510

Reference InputVoltage Deviation Over
Temperature Range - (figure 1, note1)

V

KA=Vref,IK=

10mA, T

Temperature Coefficient of Reference Input Voltage - (note 2)

V

KA=Vref,IK

= 10mA, T

Ratio of Changein Reference Input Voltage to Changein Cathode to

min.

min.

≤ T

≤ T

amb

amb

≤ T

≤ T

max.

max.

730

ppm/

±22 ±100

mV/V

Anode Voltage - (figure 2)

= 10mA, ∆VKA= 36 to 3V -1.1 -2

I

K

= 10mA, R1= 10kΩ,R2=∞

I

K

T
T

amb
min.

=25oC

≤ T

amb

≤ T

max.

1.5 2.5
3

Reference InputCurrent Deviation Over
Temperature Range - (figure 2)

= 10mA, R1= 10kΩ,R2=∞

I

K

≤ T

T

min.

amb

≤ T

max.

0.5 1

Minimum Cathode Currentfor Regulation - (figure 1)

V

KA=Vref

0.5 1

Off-State Cathode Current - (figure 3) 180 500 nA

V

mV

µA

µA

mA

o

C

Notes : 1. ∆V

2. The temperature coefficientis defined asthe slopes (positive and negative) ofthe voltage vs temperature limits whithin

3. The dynamic Impedance is definedas |Z

is defined as the difference between themaximum and minimumvalues obtained over the full temperature

ref

range.

=V

∆V

ref max.-Vref min

ref

V

V

ref ma x.

ref m in.

T1

T2

Tempe rature

which thereference voltage isguaranteed.

-

n

p

p

m

/

C

C

/

m

p

p

n

ma x

2.5V
min

V

∆

KA

| =

KA

∆I

K

+

Temp era ture

25 C

4/10

TSM102

Figure 1 : Test Circuitfor VKA=V

Input

Figure2 : Test Circuitfor VKA>V

Input

R

1

ref

ref

V

KA

I

K

V

ref

V

KA

I

K

I

ref

Figure 3 : Test Circuitfor I

Input

R

2

R

1

(1 +

)+I

ref

R

.R1

ref

2

off

V

ref

V

KA

I

off

VKA= V

= 36V

5/10

TSM102

APPLICATION NOTE

A Li-Ion BATTERY CHARGER USING TSM102A

by R. LIOU

This application note explains how to use the
TSM102 in an SMPS-type battery charger which
features :

.

Voltage Control

.

CurrentControl

.

Low BatteryDetectionand End Of Charge
Detection

Figure 1 : TSM102Pinout

1

2

3

V

CC

Vref

COMP

+

5

6

7

1 - TSM102PRESENTATION

TheTSM102integratedcircuitincludestwoOpera­tional Amplifiers,twoComparatorsandoneadjust­able precision Voltage Reference (2.5V to 36V,

0.4% or 1%).
TSM102 can sustain upto 36Vpower supply volt-

age.

TSM102

COMP

16

15

14

V

-

CC

12

11

10

Ca thode

2 - APPLICATION CONTEXT AND PRINCIPLE
OF OPERATION

In the battery charging field which requires ever
increasing performances in more and more re­duced space,the TSM102Aprovides an attractive
solutionintermsofPCB area saving,precisionand
versatility.

Figure 2 shows the secondary side of a battery
charger (SMPS type) where TSM102A is used in
optimisedconditions: the two OperationalAmplifi­ers perform current and voltage control, the two
Comparators provide ”End of Charge” and ”Low
Battery” signals and the Voltage Reference en­sures precise reference for allmeasurements.

The TSM102A is supplied by an auxiliary power
supply (forward configuration- D7) regulated by a
bipolartransistorand a zenerdiode on itsbase(Q2
and DZ), and smoothedby the capacitorsC3 and

6/10

C4. R15polarizesthe baseof thetransistor andat
the same timelimits the currentthrough the zener
diodeduringregulationmodeoftheauxiliarypower
supply.

The current and voltage regulations are made
thanks to the two OperationalAmplifiers.

The first amplifier senses the current flowthrough
the sense resistor Rs and compares it with a part
of the reference voltage (resistor bridge R7, R8,
R9). The secondamplifiercomparesthe reference
voltagewith a part ofthe charger’s output(resistor
bridge R1, R2, R3).

When either of these two operational amplifiers
tends to lower its ouput, this linear information is
propagatedtowardstheprimarysideviatwoORing
diodes (D1, D2) and an optocoupler (D3). The
compensationloops of these regulation functions
are ensuredby the capacitorsC1 and C2.

Figure2 : The ApplicationSchematic- Battery Charger SecondarySide

TSM102

The first comparator ensures the ”Low Battery”
signal generation thanks to the comparison of a
part ofthe charger’s output voltage (resistorbridge
R17, R19) and the referencevoltage. Proper hys­teresis is given thanks to R20. An improvement to
the chargers security and to the battery’slife time
optimization is achieved by lowering the current
controlmeasurement thanksto Q1 that shuntsthe
resistor R9 when thebattery’svoltageis belowthe
”Low Battery” level.

The second comparator ensures the ”End of
Charge” signalgeneration thanks to the compari­son ofa partof thecharger’s outputvoltage (resis­tor bridge R1,R2, R3) and the referencevoltage.

When either of these two signals is active, the
corresponding LED is polarized for convenient
visualizationof the battery status.

3 - CALCULATION OF THEELEMENTS

All thecomponentsvalueshavebeenchosenfor a
two-Lithium-Ionbatteries charge application:

.

CurrentControl : 720mA(Low Battery current
control : 250mA)

.

VoltageControl : 8.4V (=2x 4.2V)

.

LowBattery : 5.6V(= 2x 2.5V + 0.6V)

.

End of Charge : 8.3V(= 2x 4.15V)

Current Control :

Thevoltagereferenceispolarizedthanksto theR4
resistor (2.5mA), andthe cathode of the reference
gives a fixed2.500V voltage.

I = U / R = [ Vref ( R8 + R9 ) / (R7 + R8 + R9) ] / Rs

= [ 2.5 x (390 + 820) / (10000 + 390 + 820) ] / 0.375
= 720mA

I = 720mA
P = power dissipation through the sense resistor = R I2

= 0.375 x0.7202 = 194mW

In case of ”Low Battery” conditions, the current
controlis lowered thanks tothe following
equation:

I = U / R = = [ Vref R8 / (R7 + R8) ] / Rs

= [ 2.5 x 390/ (10000 + 390 ) ] / 0.375
= 250mA

I (LoBatt) = 250mA

Voltage Control :

Vout = Vref/ [ R2 / (R1 + R2 + R3) ]

7/10

TSM102

= 2.5 / [ 56 / (131.5 + 56 + 0.68 ) ]
= 8.400V

Vout = 8.400V

Low Batterysignal :

IfR5 = 0Ωand R6 =open :

Vout(LoBatt) = Vref / [ R19 / ( R17 + R19 ) ]

= 2.5 / [ 10 / (12.4 + 10) ]
= 5.6V

Vout(LoBatt) = 5.6V

End of Charge signal:

Vout(EOC) = Vref / [ (R2 + R3 ) /(R1 + R2 + R3) ]

= 2.5 / [ (56 + 0.68) / (131.5 + 56 + 0.68) ]
= 8.300V

Vout(EOC)= 8.300V

Notes:

The current control values must be chosen in ac­cordancewiththeelementsoftheprimaryside.The
performancesof the batterychargerin theirglobal­ity are highly dependent on the adequationof the
primary and thesecondaryelements.

The additionof the diode D9 is necessary toavoid
dramatic discharge of the battery cells in case of
the chargerdisconnectionfrom themains voltage,
and therefore, the voltage measurement is to be
operated on the cathode side of the diode not to
take its voltage dropinto account.The total bridge
value of R1, R2, R3 must ensure low battery dis­charge if the charger is disconnected from main,
but remains connected to the battery by mistake.
The chosen valuesimpose a 44µAdischarge cur­rent max.

R12andR13 aretheequivalentresistorsseenfrom
the opampand from the comparator.

Ahysteresisresistorcan be connected to the ”End
Of Charge”comparatortoensureproperhysteresis
to this signal, but this resistor must be chosen
carefully not to degrade the output voltage preci­sion.It might be neededto impose unidirectionnal
hysteresis (by inserting a diode on the positive
feedback of the comparator).

Figure 3 showshow to use the integratedVoltage
Referenceto build a precisePower Supplyfor the

Figure 3 : A precise power supply for theTSM102Aand othercomponents

Vaux

+

Vaux

9

8

13

TSM102 Vref

Vcc

+

8/10

PACKAGE MECHANICAL DATA

16 PINS- PLASTICPACKAGE

TSM102

Dim.

a1 0.51 0.020

B 0.77 1.65 0.030 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

i 5.1 0.201
L 3.3 0.130
Z 1.27 0.050

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

9/10

TSM102

PACKAGE MECHANICAL DATA

16 PINS- PLASTICMICROPACKAGE (SO)

Dim.

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

A 1.75 0.069
a1 0.1 0.2 0.004 0.008
a2 1.6 0.063

b 0.35 0.46 0.014 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.020

c1 45

o

(typ.)
D 9.8 10 0.386 0.394
E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.150 0.157

G 4.6 5.3 0.181 0.209

L 0.5 1.27 0.020 0.050
M 0.62 0.024
S8

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without express written approval of STMicroelectronics.

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o

(max.)

10/10