TSM1012
Low consumption voltage and current controller for battery chargers
and adapters
Datasheet
-
production data
Description
The TSM1012 is a highly integrated solution for
SMPS applications requiring the CV (constant
voltage) and CC (constant current) mode.
TheTSM1012 device integrates one voltage
reference and two operational amplifiers (with
ORed outputs - common collectors).
Features
Constant voltage and constant current control
Low consumption
Low voltage operation
Low external component count
Current sink output stage
Easy compensation
High ac mains voltage rejection
Voltage reference
– Fixed output voltage reference 1.25 V
– 0.5% and 1% voltage precision
The voltage reference combined with one
operational amplifier makes it an ideal voltage
controller. The other operational amplifier,
combined with few external resistors and the
voltage reference, can be used as a current
limiter.
Figure 1. Pin connections (top view)
Applications
Adapters
Battery chargers
Table 1. Order codes
Part number
TSM1012I
TSM1012AI
Temperature range
-40 to 105 °C
-40 to 105 °C
Package
D
(1)
V
ref
(%)
1
0.5
Marking
M1012
M1012A
•
•
1.
D =
“Small Outline” package (SO) - also available in tape and reel (DT).
April 2016
This is information on a product in full production.
DocID10124 Rev 2
1/14
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Contents
TSM1012
Contents
1
2
3
4
5
6
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Internal schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Principle of operation and application hints . . . . . . . . . . . . . . . . . . . . . 7
6.1
Voltage and current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1.1
6.1.2
Voltage control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.2
6.3
6.4
Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Start-up and short-circuit conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Voltage clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1
SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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DocID10124 Rev 2
TSM1012
Pin descriptions
1
Pin descriptions
Table 2. SO-8
pinout
Name
V
Ref
CC-
CC+
CV-
CV+
GND
OUT
VCC
Pin no.
1
2
3
4
5
6
7
8
Type
Analog output
Analog input
Analog input
Analog input
Analog input
Power supply
Analog output
Power supply
Function
Voltage reference
Input pin of the operational amplifier
Input pin of the operational amplifier
Input pin of the operational amplifier
Input pin of the operational amplifier
Ground line. 0 V reference for all voltages.
Output of the two operational amplifiers
Power supply line
2
Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol
VCC
Vi
Tstg
Tj
Iref
ESD
Rthja
DC supply voltage
DC supply voltage (50 mA =< I
CC
)
Input voltage
Storage temperature
Junction temperature
Voltage reference output current
Electrostatic discharge
Thermal resistance junction to ambient SO-8 package
Value
-0.3 V to Vz
-0.3 to VCC
-55 to 150
150
2.5
2
175
Unit
V
V
°C
°C
mA
kV
°C/W
3
Operating conditions
Table 4. Operating conditions
Symbol
VCC
Toper
DC supply conditions
Operational temperature
Parameter
Value
4.5 to Vz
-40 to 105
Unit
V
°C
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14
Electrical characteristics
TSM1012
4
Electrical characteristics
T
amb
= 25 °C and VCC = +18 V (unless otherwise specified).
Table 5. Electrical characteristics
Symbol
Total current consumption
I
CC
Vz
Operators
Parameter
Test condition
Min.
Typ.
Max.
Unit
Total supply current, excluding current in
voltage reference
(1)
.
VCC clamp voltage
VCC = 18 V, no load
T
min.
< T
amb
< T
max.
I
CC
= 50 mA
100
28
180
µA
V
V
io
Input offset voltage
TSM1012
TSM1012A
T
amb
= 25 °C
T
min.
T
amb
T
max.
T
amb
= 25 °C
T
min.
T
amb
T
max.
T
amb
= 25 °C
T
min.
T
amb
T
max.
T
amb
= 25 °C
T
min.
T
amb
T
max.
VCC = 4.5 V to 28 V
65
0
T
amb
= 25 °C
T
min.
T
amb
T
max.
70
60
1
0.5
7
2
20
50
100
4
5
2
3
mV
DV
io
I
io
I
ib
SVR
Vicm
CMR
Input offset voltage drift
Input offset current
Input bias current
Supply voltage rejection ration
Input common mode voltage range
Common mode rejection ratio
V/°C
30
50
150
200
nA
nA
dB
VCC -1.5
V
dB
85
Output stage
Gm
Vol
Ios
Transconduction gain. sink current only
(2)
Low output voltage at 5 mA sinking current
Output short-circuit current. Output to (VCC
- 0.6 V). Sink current only.
T
amb
= 25 °C
T
min.
T
amb
T
max.
T
min.
T
amb
T
max.
T
amb
= 25 °C
T
min.
T
amb
T
max.
6
5
0.5
1
1
250
10
400
mA/mV
mV
mA
Voltage reference
Reference input voltage
TSM1012 1% precision
TSM1012A 0.5% precision
V
ref
Reference input voltage deviation over the
temperature range
T
amb
= 25 °C
T
min.
T
amb
T
max.
T
amb
= 25 °C
T
min.
T
amb
T
max.
T
min.
T
amb
T
max.
1.238 1.25
1.225
1.244 1.25
1.237
20
1.262
1.273
1.256
1.261
30
V
ref
V
mV
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DocID10124 Rev 2
TSM1012
Table 5. Electrical characteristics (continued)
Symbol
RegLine
RegLoad
Parameter
Test condition
Electrical characteristics
Min.
Typ.
Max.
20
10
Unit
mV
mV
Reference input voltage deviation over the VCC Iload = 1 mA
range.
Reference input voltage deviation over the
output current.
VCC = 18 V,
0 < Iload < 2.5 mA
1. Test conditions: pin 2 and 6 connected to GND, pin 4 and 5 connected to 1.25 V, pin 3 connected to 200 mV.
2. The current depends on the difference voltage between the negative and the positive inputs of the amplifier. If the voltage on
the minus input is 1 mV higher than the positive amplifier, the sinking current at the output OUT will be increased by
Gm x 1 mA.
DocID10124 Rev 2
5/14
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