TSM102ID [STMICROELECTRONICS]

DUAL OPERATIONAL AMPLIFIER - DUAL COMPARATOR AND ADJUSTABLE VOLTAGE REFERENCE; 双路运算放大器 - 双比较器和可调电压基准


型号：	TSM102ID
厂家：	ST
描述：	DUAL OPERATIONAL AMPLIFIER - DUAL COMPARATOR AND ADJUSTABLE VOLTAGE REFERENCE 双路运算放大器 - 双比较器和可调电压基准比较器运算放大器光电二极管
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TSM102/A

DUAL OPERATIONAL AMPLIFIER - DUAL COMPARATOR

AND ADJUSTABLE VOLTAGE REFERENCE

OPERATIONAL AMPLIFIERS

LOW SUPPLYCURRENT : 200µA/amp.

MEDIUM SPEED : 2.1MHz

LOW LEVEL OUTPUT VOLTAGE CLOSE TO

V_CC^-: 0.1V typ.

INPUT COMMON MODE VOLTAGE RANGE

INCLUDES GROUND

DIP16

(Plastic Package)

COMPARATORS

LOW SUPPLYCURRENT : 200µA/amp.

(V_CC= 5V)

INPUT COMMON MODE VOLTAGE RANGE

INCLUDES GROUND

LOW OUTPUT SATURATION VOLTAGE :

250mV (I_o= 4mA)

SO16

(Plastic Micropackage)

REFERENCE

ADJUSTABLE OUTPUT VOLTAGE :

_refto 32V

ORDER CODES

SINK CURRENT CAPABILITY : 1 to 100mA

1% and 0.4% VOLTAGE PRECISION

Package

Part number Temperature Range

LACTH-UP IMMUNITY

TSM102I

-40^oC, +85^oC

•

TSM102AI

PIN CONNECTIONS

Output

Output 4

Inverting Input 1

Inverting Input

Non-inverting Input 1

Non-inverting Input

COMP

V_CC

Non-inverting Input 2

Inverting Input 2

Non-inverting Input

Inverting Input 3

DESCRIPTION

Output

Output 3

Ca thode

The TSM102 is a monolithic IC that includes two

op-amps, two comparators and a precisionvoltage

reference. This device is offering space and cost

savingin many applicationslike powersupply man-

agement or data acquisitionsystems.

Vref

February1999

1/10

TSM102

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

V_CC

V_id

Supply Voltage

Differential Input Voltage

Input Voltage

V_i

-0.3 to +36

-40 to +125

150

T_oper

T_j

Operating Free-air Temperature Range

Maximum Junction Temperature

^oC

Thermal Resistance Juction to Ambient (SO package)

150

^oC/W

ELECTRICAL CHARACTERISTICS

V_CC⁺= 5V, V_CC^-= 0V, T_amb= 25^oC (unless otherwise specified)

Symbol

Parameter

Min

Typ

Max

Unit

I_CC

Total Supply Current

T_min.< T_amb< T_max.

0.8

1.5

OPERATIONAL AMPLIFIERS

V_CC⁺= 5V, V_CC= GND, R1 connectedto V_CC/2,T_amb= 25^oC (unlessotherwise specified)

Symbol

Parameter

Min.

Typ.

Max.

Unit

V_io

Input Offset Voltage

_min.≤ T_amb≤ T_max.

4.5

6.5

DV_io

I_ib

Input Offset Voltage Drift

µV/^oC

Input Bias Current

100

200

_min.≤ T_amb≤ T_max.

Input Offset Current

_min.≤ T_amb≤ T_max.

I_io

A_vd

Large Signal Voltage Gain

R1 = 10k, V_CC⁺= 30V, V_o= 5V to 25V

100

V/mV

_min.≤ T_amb≤ T_max.

SVR

V_icm

CMR

I_sc

Supply Voltage Rejection Ratio

V_CC= 5V to 30V

Input Common Mode Voltage Range

(VCC^-) to (V_CC⁺) -1.8

_min.≤ T_amb≤ T_max.

(V_CC^-) to (V_CC⁺) -2.2

Common Mode Rejection Ratio

V_CC⁺= 30V, V_icm= 0V to (V_CC⁺) -1.8V

Output Short Circuit Current

V_id= ±1V, V_o= 2.5V

Source

Sink

V_OH

High Level Output Voltage

R_L= 10kΩ

V_CC⁺= 30V

100

_min.≤ T_amb≤ T_max.

V_OL

Low Level Output Voltage

_min.≤ T_amb≤ T_max.

150

210

Slew Rate

V_CC= ±15V

1.6

1.4

V/µs

V_i= ±10V, R_L= 10kΩ, C_L= 100pF

GBP

Gain Bandwidth Product

2.1

MHz

Degrees

R_L= 10kΩ, C_L= 100pF, f = 100kHz

Phase Margin

R_L= 10kΩ,C_L= 100pF

THD

e_n

Total Harmonic Distortion

0.05

Equivalent Input Noise Voltage

f = 1kHz

√Hz

C_s

Channel Separation

120

2/10

TSM102

COMPARATORS

V_CC⁺= +5V, V_CC= Ground, T_amb= 25^oC (unless otherwise specified)

Symbol

Parameter

Min.

Typ.

Max.

Unit

V_io

Input Offset Voltage

_min.≤ T_amb≤ T_max.

I_io

I_ib

Input Offset Current

_min.≤ T_amb≤ T_max.

150

Input Bias Current

_min.≤ T_amb≤ T_max.

250

400

I_OH

High Level Output Current

V_id= 1V, V_CC= V_o= 30V

0.1

µA

_min.≤ T_amb≤ T_max.

V_OL

Low Level Output Voltage

V_id= -1V, I_sink= 4mA

250

400

700

_min.≤ T_amb≤ T_max.

A_vd

I_sink

V_icm

Large Signal Voltage Gain

V/mV

R1 = 15k, V_CC= 15V, V_o= 1 to 11V

200

Output Sink Current

V_id= -1V, V_o= 1.5V

Input Common Mode Voltage Range

VCC⁺-1.5

V_CC⁺-2

_min.≤ T_amb≤ T_max.

V_id

t_re

Differential Input Voltage

V_CC

Response Time - (note 1)

1.3

µs

R1 = 5.1k to V_CC⁺, V_ref= 1.4V

t_rel

Large Signal Response Time

300

V_ref= 1.4V, V_i= TTL, R1 = 5.1k to V_CC

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

For larger overdrive signals, 300ns can be obtained.

3/10

TSM102

VOLTAGE REFERENCE

Symbol

Parameter

Cathode to Anode Voltage

Cathode Current

Value

Unit

V_KA

I_K

V_refto 36

1 to 100

ELECTRICAL CHARACTERISTICS

T_amb= 25^oC (unless otherwise specified)

Symbol

Parameter

Min.

Typ.

Max.

Unit

V_ref

Reference Input Voltage - (figure 1) - T_amb= 25^oC

TSM102, V_KA= V_ref, I_K= 10mA

2.475

2.490

2.500

2.525

2.510

TSM102A, V_KA= V_ref, I_K= 10mA

∆V_ref

Reference Input Voltage Deviation Over

Temperature Range - (figure 1, note1)

V_KA= V_ref,I_{K =}10mA, T_min.≤ T_amb≤ T_max.

±100

-2

∆V_ref

∆T

Temperature Coefficient of Reference Input Voltage - (note 2)

ppm/^oC

mV/V

µA

_KA= V_ref, I_K= 10mA, T_min.≤ T_amb≤ T_max.

±22

-1.1

1.5

∆V_ref

∆V_KA

Ratio of Change in Reference Input Voltage to Change in Cathode to

Anode Voltage - (figure 2)

I_K= 10mA, ∆V_KA= 36 to 3V

Iref

Reference Input Current - (figure 2)

I_K= 10mA, R₁= 10kΩ, R₂= ∞

T_amb= 25^oC

2.5

_min.≤ T_amb≤ T_max.

∆I_ref

Reference Input Current Deviation Over

Temperature Range - (figure 2)

I_K= 10mA, R₁= 10kΩ, R₂= ∞

µA

0.5

_min.≤ T_amb≤ T_max.

I_min

I_off

Minimum Cathode Current for Regulation - (figure 1)

V_KA= V_ref

0.5

Off-State Cathode Current - (figure 3)

180

500

Notes : 1. ∆V_refis defined as the difference between the maximum and minimum values obtained over the full temperature

range.

∆V_ref= V_{ref max.}- V_{ref min}

V_{ref max.}

V_refmin.

Temperature

2. The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits whithin

which the reference voltage is guaranteed.

ma x

2.5V

m in

Tempera ture

∆V_KA

∆I_K

3. The dynamic Impedance is defined as |Z_KA| =

4/10

TSM102

Figure 1 : Test Circuit for V_KA= V_ref

Input

ref

Figure 2 : Test Circuit for V_KA> V_ref

V_KA

Input

I_K

I_ref

R₁

R₂

ref

V_KA= V_ref(1 +

) + I_ref. R1

Figure 3 : Test Circuit for I_off

= 36V

V_KA

Input

I_off

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 :

1 - TSM102 PRESENTATION

TheTSM102 integratedcircuit includes twoOpera-

tional Amplifiers, two Comparators and oneadjust-

able precision Voltage Reference (2.5V to 36V,

0.4% or 1%).

Voltage Control

Current Control

Low Battery Detection and End Of Charge

Detection

TSM102 can sustain up to 36V power supply volt-

age.

Figure 1 : TSM102 Pinout

TSM102

COMP

V_CC

Vref

Ca thode

2 - APPLICATION CONTEXT AND PRINCIPLE

OF OPERATION

C4. R15 polarizes the base of the transistor and at

the same time limits the current through the zener

diodeduringregulationmode ofthe auxiliarypower

supply.

In the battery charging field which requires ever

increasing performances in more and more re-

duced space, the TSM102Aprovides an attractive

solution interms ofPCB area saving,precisionand

versatility.

The current and voltage regulations are made

thanks to the two Operational Amplifiers.

The first amplifier senses the current flow through

the sense resistor Rs and compares it with a part

of the reference voltage (resistor bridge R7, R8,

R9). The second amplifiercompares the reference

voltage with a part ofthe charger’s output (resistor

bridge R1, R2, R3).

Figure 2 shows the secondary side of a battery

charger (SMPS type) where TSM102A is used in

optimised conditions : the two Operational Amplifi-

ers perform current and voltage control, the two

Comparators provide ”End of Charge” and ”Low

Battery” signals and the Voltage Reference en-

sures precise reference for all measurements.

When either of these two operational amplifiers

tends to lower its ouput, this linear information is

propagatedtowardstheprimaryside viatwo ORing

diodes (D1, D2) and an optocoupler (D3). The

compensation loops of these regulation functions

are ensuredby the capacitors C1 and C2.

The TSM102A is supplied by an auxiliary power

supply (forward configuration- D7) regulated by a

bipolar transistoranda zenerdiode on its base (Q2

and DZ), and smoothed by the capacitorsC3 and

6/10

TSM102

Figure 2 : The Application Schematic - Battery Charger Secondary Side

The first comparator ensures the ”Low Battery”

signal generation thanks to the comparison of a

part ofthe charger’s output voltage (resistor bridge

R17, R19) and the reference voltage. Proper hys-

teresis is given thanks to R20. An improvement to

the chargers security and to the battery’s life time

optimization is achieved by lowering the current

control measurement thanks to Q1 that shunts the

resistor R9 when the battery’s voltage is below the

”Low Battery” level.

Voltage Control : 8.4V (= 2x 4.2V)

Low Battery : 5.6V (= 2x 2.5V + 0.6V)

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

Current Control :

The voltage referenceis polarized thanksto the R4

resistor (2.5mA), and the cathode of the reference

gives a fixed 2.500V voltage.

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

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

= 720mA

The second comparator ensures the ”End of

Charge” signal generation thanks to the compari-

son of a partof the charger’s outputvoltage (resis-

tor bridge R1, R2, R3) and the referencevoltage.

I = 720mA

P = power dissipation through the sense resistor = R I2

= 0.375 x 0.7202 = 194mW

In case of ”Low Battery” conditions, the current

control is lowered thanks to the following

equation :

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

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

= 250mA

When either of these two signals is active, the

corresponding LED is polarized for convenient

visualization of the battery status.

3 - CALCULATION OF THE ELEMENTS

I (LoBatt) = 250mA

All the componentsvalues have been chosen for a

two-Lithium-Ionbatteries charge application :

Voltage Control :

Current Control : 720mA (Low Battery current

control : 250mA)

Vout

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

7/10

TSM102

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

= 8.400V

Vout = 8.400V

The additionof the diode D9 is necessary to avoid

dramatic discharge of the battery cells in case of

the charger disconnectionfrom the mains voltage,

and therefore, the voltage measurement is to be

operated on the cathode side of the diode not to

take its voltage drop into account. The total bridge

value of R1, R2, R3 must ensure low battery dis-

charge if the charger is disconnected from main,

but remains connected to the battery by mistake.

The chosen values impose a 44µA discharge cur-

rent max.

Low Battery signal :

If R5 = 0Ω and 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

R12andR13 are theequivalentresistorsseenfrom

the opamp and from the comparator.

A hysteresis resistor can be connected to the ”End

Of Charge”comparatorto ensureproperhysteresis

to this signal, but this resistor must be chosen

carefully not to degrade the output voltage preci-

sion. It might be needed to impose unidirectionnal

hysteresis (by inserting a diode on the positive

feedback of the comparator).

Vout (EOC)= 8.300V

Notes:

The current control values must be chosen in ac-

cordancewiththe elementsoftheprimary side. The

performancesof the batterycharger in their global-

ity are highly dependent on the adequation of the

primary and the secondary elements.

Figure 3 shows how to use the integrated Voltage

Reference to build a precise Power Supply for the

Figure 3 : A precise power supply for the TSM102A and other components

Vaux

Vcc

Vaux

TSM102 Vref

8/10

TSM102

PACKAGE MECHANICAL DATA

16 PINS - PLASTIC PACKAGE

Millimeters

Inches

Typ.

Dim.

Min.

0.51

0.77

Typ.

Max.

Min.

0.020

0.030

Max.

1.65

0.065

0.5

0.020

0.010

0.25

0.787

8.5

2.54

0.335

0.100

0.700

17.78

7.1

5.1

0.280

0.201

3.3

0.130

1.27

0.050

9/10

TSM102

PACKAGE MECHANICAL DATA

16 PINS - PLASTIC MICROPACKAGE (SO)

Millimeters

Dim.

Inches

Typ.

Min.

Typ.

Max.

1.75

0.2

Min.

Max.

0.069

0.008

0.063

0.018

0.010

0.1

0.004

1.6

0.35

0.19

0.46

0.25

0.014

0.007

0.5

0.020

45^o(typ.)

9.8

5.8

0.386

0.228

0.394

0.244

6.2

1.27

8.89

0.050

0.350

3.8

4.6

0.5

4.0

5.3

0.150

0.181

0.020

0.157

0.209

0.050

0.024

1.27

0.62

8^o(max.)

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the

consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from

its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications

mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information

previously supplied.STMicroelectronics productsare not authorized for useas critical components in life support devices orsystems

without express written approval of STMicroelectronics.

The ST logo is a trademark of STMicroelectroni cs

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10/10

TSM102ID [STMICROELECTRONICS]

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