TSM102_04 [STMICROELECTRONICS]
VOLTAGE AND CURRENT CONTROLLER; 电压和电流控制器
| 型号： | TSM102_04 |
| 厂家： | 
ST |
| 描述： | VOLTAGE AND CURRENT CONTROLLER |
| 文件： | 总9页 (文件大小：102K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TSM102/A
VOLTAGE AND CURRENT CONTROLLER
OPERATIONAL AMPLIFIERS
■ LOW SUPPLY CURRENT : 200µA/amp.
■ MEDIUM SPEED : 2.1MHz
■ LOW LEVEL OUTPUT VOLTAGE CLOSE TO
-
V
: 0.1V typ.
CC
■ INPUT COMMON MODE VOLTAGE RANGE
INCLUDES GROUND
COMPARATORS
■ LOW SUPPLY CURRENT : 200µA/amp.
■ (V = 5V)
CC
■ INPUT COMMON MODE VOLTAGE RANGE
INCLUDES GROUND
■ LOW OUTPUT SATURATION VOLTAGE :
250mV (Io = 4mA)
D
SO16
(Plastic Micropackage)
REFERENCE
■ ADJUSTABLE OUTPUT VOLTAGE :
■ V to 36V
ref
■ SINK CURRENT CAPABILITY : 1 to 100mA
■ 1% and 0.4% VOLTAGE PRECISION
■ LACTH-UP IMMUNITY
PIN CONNECTIONS (top view)
DESCRIPTION
The TSM102 is a monolithic IC that includes two
op-amps, two comparators and a precision volt-
age reference. This device is offering space and
cost saving in many applications like power supply
management or data acquisition systems.
Output 1
16
15
14
13
12
11
10
9
Output 4
1
2
3
Inverting Input 1
Inverting Input
Non-inverting Input 1
Non-inverting Input 4
COMP
COMP
ORDER CODE
VCC
-
VCC
+
4
5
Non-inverting Input 2
Inverting Input 2
Non-inverting Input 3
Inverting Input 3
Package
Temperature
Part Number
6
7
8
Range
D
Output 2
Vref
Output 3
Cathode
TSM102I
-40°C, +85°C
-40°C, +85°C
•
•
TSM102AI
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
January 2004
1/9
TSM102/A
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
DC supply Voltage
36
36
V
V
V
Differential Input Voltage
id
Vi
Input Voltage
-0.3 to +36
-40 to +125
150
V
Toper
Operating Free-air Temperature Range
Maximum Junction Temperature
Thermal Resistante Junction to Ambient
°C
T
°C
j
150
°C/W
ELECTRICAL CHARACTERISTICS
VCC+ = 5V, VCC- = 0V, Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
Min.
Typ
Max.
Unit
Total Supply Current
min. ≤ Tamb ≤ Tmax
0.8
1.5
2
mA
I
CC
T
OPERATIONAL AMPLIFIER
VCC+ = 5V, VCC = GND, R1 connected to V , Tamb = 25°C (unless otherwise specified)
cc/2
Symbol
Parameter
Min.
Typ.
Max.
Unit
Input Offset Voltage
≤ T ≤ T
max
1
4.5
6.5
mV
V
io
T
min
amb
DV
Input Offset Voltage Drift
Input Bias Current
10
20
µV/°C
io
100
200
nA
I
ib
T
≤ T
≤ T
min
amb
max
Input Offset Current
≤ T ≤ T
5
20
40
nA
I
io
T
min
amb
max
Large Signal Voltage Gain
+
A
R1=10k, V = 30V, V = 5V to 25V
50
25
100
100
V/mV
vd
cc
o
T
≤ T
≤ T
amb max
min
Supply Voltage Rejection Ratio
= 5V to 30V
SVR
dB
V
V
80
cc
-
+
(V ) to (V ) -1.8
Input Common Mode Rejection Ratio
≤ T ≤ T
cc
cc
V
icm
-
+
T
min
amb
max
(V ) to (V ) -2.2
cc
cc
Common Mode Rejection Ratio
70
90
dB
CMR
+
+
V
= 30V, Vicm = 0V to (V ) -1.8
cc
cc
Output Short Circuit Current
= ±1V, V = 2.5V
mA
V
id
o
I
sc
3
3
6
6
Source
Sink
High Level Output Voltage
R = 10kΩ
L
V
+
V
27
26
28
V
T
= 30V
OH
cc
≤ T
≤ T
max
min
amb
Low Level Output Voltage
≤ T ≤ T
R = 10kΩ
100
2
150
210
mV
L
V
OL
T
min
amb
max
Slew Rate
1.6
V/µs
V
= ±15V
SR
cc
V = ±10V, R = 10kΩ, C = 100pF
i
L
L
2/9
TSM102/A
Symbol
Parameter
Gain Bandwidth Product
Min.
Typ.
Max.
Unit
1.4
2.1
MHz
GBP
R = 10kΩ, C = 100pF, f = 100kHZ
L
L
Phase Margin
Degrees
%
m
R = 10kΩ, C = 100pF
45
L
L
THD
Toatal Harmonic Distortion
0.05
nV
Equivalent Input Noise Voltage
f = 1kHz
-----------
e
n
29
Hz
COMPARATORS
VCC+ = 5V, VCC = Ground, Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
Min.
Typ
Max.
Unit
Input Offset Voltage
≤ T ≤ T
5
9
mV
V
io
T
min
amb
max
max
max
Input Offset Current
50
150
nA
nA
I
io
T
≤ T
≤ T
≤ T
min
amb
Input Bias Current
≤ T
250
400
I
ib
T
min
amb
High Level Output Current
0.1
nA
µA
V
= 1V, V = V = 30V
I
1
id
cc
o
OH
T
≤ T
≤ T
max
min
amb
Low Level Output Voltage
mV
V
= -1V, I
= 4mA
V
250
400
700
id
sink
OL
T
≤ T
≤ T
max
min
amb
Large Signal Voltage Gain
V/mV
mA
A
vd
R1 = 15k, V = 15V, V = 1 to 11V
200
16
cc
o
Output Sink Current
6
I
sink
V
= -1V, V = 1.5V
id
o
+
V
-1.5
Input Common Mode Voltage Range
≤ T ≤ T
0
0
V
cc
V
icm
+
T
min
amb
max
V
-2
cc
+
V
Differential Input Voltage
V
V
id
cc
1)
Response Time
1.3
µs
t
re
+
R1 = 5.1k to V
,V = 1.4V
ref
cc
Large Signal Response Time
= 1.4V, Vi = TTL, R1 = 5.1k to V
300
t
rel
+
ns
V
ref
cc
1.
The response time specified is for 100mV input step with 5mV overdrive.
For larger overdrive signals, 300ns can be obtained.
VOLTAGE REFERENCE
Symbol
Parameter
Value
to 36
Unit
V
VKA
Cathode to Anode Voltage
Cathode Current
V
ref
I
1 to 100
mA
k
3/9
TSM102/A
ELECTRICAL CHARACTERISTICS
= 25°C (unless otherwise specified)
T
amb
Symbol
Parameter
Min.
Typ
Max.
Unit
Reference Input Voltage -(figure1)- T
= 25°C
amb
V
V
TSM102, V = V , I = 10mA
KA ref K
2.475
2.490
2.500
2.500
2.525
2.510
ref
TSM102A, V = V , I = 10mA
KA
ref
K
Reference Input Voltage Deviation Over
mV
1)
∆V
Temperature Range -(figure1, note )
ref
7
30
V
= V , I = 10mA, T
≤ T
≤ T
amb max
KA
ref
K
min
2)
∆V
ppm/°C
Temperature Coefficient of Reference Input Voltage - note
= V , I = 10mA, T ≤ T ≤ T
ref
---------------
±22
V
±100
∆T
KA
ref
K
min
amb
max
Ratio of Change in Reference Input Voltage to Change in Cath-
ode to Anode Voltage -(figure2)
mV/V
∆V
ref
---------------
∆V
I = 10mA, ∆V = 36 to 3V
KA
-1.1
1.5
-2
K
KA
Reference Input Current -(figure2)
I = 10mA, R1 = 10kΩ, R2 = ∞
µA
µA
K
Iref
T
= 25°C
2.5
3
amb
T
≤ T
≤ T
amb max
min
Reference Input Current Deviation Over
Temperature Range -(figure2)
∆Iref
I = 10mA, R1 = 10kΩ, R2 = ∞
0.5
1
K
T
≤ T
≤ T
amb max
min
Minimum Cathode Current for Regulation -(figure1)
= V
mA
nA
I
min
V
0.5
1
KA
ref
Ioff
Off-State Cathode Current -(figure3)
180
500
1.
2.
∆V is defined as the difference between the maximum and minimum values obtained over the full temperature range.
ref
∆V = Vref max. - Vref min
ref
The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits whithin
which the reference voltage is guaranteed.
- n ppm / °C
Vref max.
+ n ppm / °C
max
2.5V
min
Vref min.
Temperature
T2
T1
Temperature
25°C
4/9
TSM102/A
Figure 1 : Test Circuit for V = V
KA
ref
V
Input
KA
I
K
V
ref
Figure 2 : Test Circuit for V > V
KA
ref
VKA
Input
IK
R
1
R1
1 + ------- + I
ref
R2
V
= V
– R1
KA
ref
Iref
R
2
V
ref
Figure 3 : Test Circuit for I
off
= 36V
VKA
Input
Ioff
5/9
APPLICATION NOTE
A BATTERY CHARGER USING THE TSM102
This application note explains how to use the
1 - TSM102 PRESENTATION
TSM102 in an SMPS-type battery charger which
features :
The TSM102 integrated circuit includes two Oper-
ational Amplifiers, two Comparators and one ad-
justable precision Voltage Reference (2.5V to
36V, 0.4% or 1%).
TSM102 can sustain up to 36V power supply volt-
age.
■ Voltage Control
■ Current Control
■ Low Battery Detection and End Of Charge
Detection
Figure 1: TSM102 Pinout
16
15
1
TSM102
2
3
14
COMP
COMP
VCC
+
5
6
7
VCC
-
12
11
10
Vref
Cathode
2 - APPLICATION CONTEXT AND PRINCIPLE
OF OPERATION
and C4. R15 polarizes the base of the transistor
and at the same time limits the current through the
zener diode during regulation mode of the auxilia-
ry power supply.
In the battery charging field which requires ever in-
creasing performances in more and more reduced
space, the TSM102A provides an attractive solu-
tion in terms of PCB area saving, precision and
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 amplifier compares the reference
voltage with a part of the 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
propagated towards the primary side via two OR-
ing diodes (D1, D2) and an optocoupler (D3). The
compensation loops of these regulation functions
are ensured by the capacitors C1 and C2.
The TSM102A is supplied by an auxiliary power
supply (forward configuration - D7) regulated by a
bipolar transistor and a zener diode on its base
(Q2 and DZ), and smoothed by the capacitors C3
6/9
TSM102/A
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 of the charger’s output voltage (resistor
bridge R17, R19) and the reference voltage. Prop-
er hysteresis is given thanks to R20. An improve-
ment 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.
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 = [ V R8 / (R7 + R8) ] / Rs
ref
= [ 2.5 x 390 / (10000 + 390 ) ] / 0.375
= 250mA
The second comparator ensures the “End of
Charge” signal generation thanks to the compari-
son of a part of the charger’s output voltage (resis-
tor bridge R1, R2, R3) and the reference voltage.
When either of these two signals is active, the cor-
responding LED is polarized for convenient visual-
ization of the battery status.
I (LoBatt) = 250mA
Voltage Control :
V
= V / [ R2 / (R1 + R2 + R3) ]
out
ref
= 2.5 / [ 56 / (131.5 + 56 + 0.68 ) ]
= 8.400V
V
= 8.400V
out
3 - CALCULATION OF THE ELEMENTS
Low Battery signal :
All the components values have been chosen for a
two-Lithium-Ion batteries charge application :
If R5 = 0Ω and R6 = open :
■ Current Control : 720mA (Low Battery current
V
(LoBatt) = Vref / [ R19 / ( R17 + R19 ) ]
= 2.5 / [ 10 / (12.4 + 10) ]
= 5.6V
out
control : 250mA)
■ Voltage Control : 8.4V (= 2x 4.2V)
■ Low Battery : 5.6V (= 2x 2.5V + 0.6V)
■ End of Charge : 8.3V (= 2x 4.15V)
V
(LoBatt) = 5.6V
out
Current Control :
End of Charge signal :
The voltage reference is polarized thanks to the
R4 resistor (2.5mA), and the cathode of the refer-
ence gives a fixed 2.500V voltage.
V
(EOC) = Vref / [ (R2 + R3 ) / (R1 + R2 + R3) ]
= 2.5 / [(56 + 0.68) / (131.5 + 56 + 0.68)]
= 8.300V
out
I = U / R = [V ( R8 + R9 ) / (R7 + R8 + R9) ] / Rs
ref
= [2.5 x (390 + 820) / (10000 + 390 + 820)] / 0.375
= 720mA
V
(EOC)= 8.300V
out
7/9
TSM102/A
Notes:
The chosen values impose a 44µA discharge cur-
rent max.
The current control values must be chosen in ac-
cordance with the elements of the primary side.
The performances of the battery charger in their
globality are highly dependent on the adequation
of the primary and the secondary elements.
R12 and R13 are the equivalent resistors seen
from the opamp and from the comparator.
A hysteresis resistor can be connected to the “End
Of Charge” comparator to ensure proper hystere-
sis 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).
Figure 3 shows how to use the integrated Voltage
Reference to build a precise Power Supply for the
TSM102A (and other components if necessary).
Pin 8 remains the reference for all voltage mea-
surements for the rest of the application.
The addition of the diode D9 is necessary to avoid
dramatic discharge of the battery cells in case of
the charger disconnection from 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.
Figure 3 : A precise power supply for the TSM102A and other components
Vaux
Vcc
Vaux
+
+
9
8
13
TSM102 Vref
8/9
TSM102/A
PACKAGE MECHANICAL DATA
SO-16 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
1.75
0.2
MIN.
MAX.
0.068
0.008
0.064
0.018
0.010
A
a1
a2
b
0.1
0.004
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45˚ (typ.)
9.8
5.8
10
0.385
0.228
0.393
0.244
E
6.2
e
1.27
8.89
0.050
0.350
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.024
G
L
1.27
0.62
M
S
8
˚ (max.)
PO13H
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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 products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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All other names are the property of their respective owners.
© 2004 STMicroelectronics - All Rights Reserved
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