M1014A [STMICROELECTRONICS]
Low Consumption Voltage and Current Controller for Battery Chargers and Adaptors; 低消耗电压和电流控制器电池充电器及转换器
| 型号： | M1014A |
| 厂家： | 
ST |
| 描述： | Low Consumption Voltage and Current Controller for Battery Chargers and Adaptors |
| 文件： | 总10页 (文件大小：132K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TSM1014
Low Consumption Voltage and Current
Controller for Battery Chargers and Adaptors
■ Constant voltage and constant current
control
■ Low consumption
■ Low voltage operation
■ Low external component count
■ Current sink output stage
■ Easy compensation
D
SO-8
(Plastic Package)
■ High ac mains voltage rejection
■ 2kV ESD protection (HBM)
Voltage Reference:
■ Fixed output voltage reference 1.25V
■ 0.5% and 1% Voltage precision
S
MiniSO-8
(Plastic Micropackage)
DESCRIPTION
TSM1014 is a highly integrated solution for SMPS
applications requiring CV (constant voltage) and
CC (constant current) mode.
PIN CONNECTIONS (top view)
TSM1014 integrates one voltage reference and
two operational amplifiers.
1
2
3
4
Vref
Cc-
Cc+
Cv-
Vcc
8
Cc Out 7
Gnd 6
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.
Cv Out 5
APPLICATIONS
■ Adapters
■ Battery chargers
ORDER CODES
Part Number
TSM1014ID
Temperature Range
Package
Packaging
VRef (%)
Marking
Tube
1
1
M1014
M1014
M1014A
M1014A
M808
TSM1014IDT
TSM1014AID
TSM1014AIDT
TSM1014IST
TSM1014AIST
Tape & Reel
Tube
SO-8
0.5
0.5
1
-40 to 105°C
Tape & Reel
Tape & Reel
Tape & Reel
mini SO-8
0.5
M809
July 2004
Revision 1
1/10
TSM1014
Pin Descriptions
1 Pin Descriptions
The table below gives the pin descriptions for both SO8 & MiniSO8 packages.
Name
VRef
Pin #
Type
Function
1
2
3
4
5
6
7
8
Analog Output
Analog Input
Analog Input
Analog Input
Analog Output
Power Supply
Analog Output
Power Supply
Voltage Reference
CC-
Input pin of the operational amplifier
Input pin of the operational amplifier
Input pin of the operational amplifier
Output of the operational amplifier
Ground Line. 0V Reference For All Voltages
Output of the operational amplifier
Power supply line.
CC+
CV-
CVOUT
Gnd
CCOUT
Vcc
2 Absolute Maximum Ratings
Symbol
DC Supply Voltage
Value
-0.3V to Vz
Unit
Vcc
Vi
DC Supply Voltage (50mA =< Icc)
Input Voltage
V
V
-0.3 to Vcc
PT
Power dissipation
W
Toper Operational temperature
0 to 105
-55 to 150
150
°C
Tstg
Tj
Storage temperature
°C
Junction temperature
°C
Iref
Voltage reference output current
Electrostatic Discharge
2.5
mA
kV
ESD
Rthja
Rthja
2
Thermal Resistance Junction to Ambient Mini SO8 package
Thermal Resistance Junction to Ambient SO8 package
180
°C/W
°C/W
175
3 Operating Conditions
Symbol
Parameter
Value
Unit
Vcc
DC Supply Conditions
4.5 to Vz
V
Toper Operational temperature
-40 to 105
°C
2/10
Electrical Characteristics
TSM1014
4 Electrical Characteristics
Tamb = 25°C and Vcc = +18V (unless otherwise specified)
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
Total Current Consumption
Total Supply Current, excluding current Vcc = 18V, no load
Icc
Vz
100
28
180
µA
V
1
Tmin. < Tamb < Tmax.
in Voltage Reference .
Vcc clamp voltage
Icc = 50mA
Operator 1: Op-amp with non-inverting input connected to the internal VRef
Input Offset Voltage + Voltage reference Tamb = 25°C
TSM1014
1.251
1.25
Tmin. ≤ Tamb ≤ Tmax.
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
1.266
1.279
1.258
1.267
VRef+Vio
TSM1014A
V
DVio
Input Offset Voltage Drift
7
µV/°C
Operator 2
Input Offset Voltage
TSM1014
T
amb = 25°C
4
5
2
3
1
0.5
7
Tmin. ≤ Tamb ≤ Tmax.
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
Vio
mV
TSM1014A
DVio
Iib
Input Offset Voltage Drift
Input Bias Current
µV/°C
nA
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
20
50
150
200
Supply Voltage Rejection Ration
Input Common Mode Voltage Range
Common Mode Rejection Ratio
VCC = 4.5V to 28V
SVR
Vicm
65
0
100
dB
Vcc-1.5
V
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
70
60
85
CMR
dB
Output stage
Transconduction Gain. Sink Current
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
1
1
Gm
Vol
Ios
mA/mV
mV
2
0.5
Only
Low output voltage at 5 mA sinking cur- Tmin. ≤ Tamb ≤ Tmax.
rent
250
10
400
Output Short Circuit Current. Output to
(Vcc-0.6V). Sink Current Only
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
6
5
mA
Voltage reference
Reference Input Voltage
TSM1014 1% precision
Tamb = 25°C
Tmin. ≤ Tamb ≤ Tmax.
Tamb = 25°C
1.238
1.225
1.244
1.237
1.25
1.25
1.262
1.273
1.256
1.261
V
Ref
V
TSM1014A 0.5% precision
Tmin. ≤ Tamb ≤ Tmax.
Reference Input Voltage Deviation Over Tmin. ≤ Tamb ≤ Tmax.
Temperature Range
∆VRef
20
30
20
10
mV
mV
mV
Reference input voltage deviation over Iload = 1mA
Vcc range.
RegLine
RegLoad
Reference input voltage deviation over Vcc = 18V,
output current.
0 < Iload < 2.5mA
1) Test conditions: pin 2 and 6 connected to GND, pin 4 and 5 connected to 1.25V, pin 3 connected to 200mV.
2) The current depends on the voltage difference between the negative and the positive inputs of the amplifier. If the voltage on the minus
input is 1mV higher than the positive amplifier, the sinking current at the output OUT will be increased by Gm*1mA.
3/10
TSM1014
Electrical Characteristics
Figure 1: Internal schematic
Vref
Cc-
Vcc
1
2
3
4
8
7
6
5
Vref
28V
Ccout
CC
CV
Cc+
Cv-
Gnd
Cvout
Figure 2: Typical adapter or battery charger application using TSM1014
Vcc
OUT+
Rlimit
D
Vcc
1
R2
Vref
28V
IL
DS
R3
100
5
4
7
CV Out
Cv-
CV
R4
100K
+
TSM1014
CC
Cvc1
2.2nF
3
Cc+
Rvc1
22K
CC Out
R1
CS
Cic1
2.2nF
+
+
Cc-
Gnd
Ric1
22K
R5
10K
Ric2
1K
Vsense
OUT-
Rsense
IL
In the application schematic shown in Figure 2, the TSM1014 is used on the secondary side of a flyback
adapter (or battery charger) to provide an accurate voltage and current control. The above feedback loop
is made with optocoupler.
4/10
Principles of Operation and Application Tips
TSM1014
5 Principles of Operation and Application Tips
5.1 Voltage control
The voltage loop is controlled via a first trans-conductance operational amplifier, the resistor bridge R1,
R2, and the optocoupler which is directly connected to the output.
The relation between the values of R1 and R2 should be chosen as written in Equation 1.
R1 = R2 x V
/ (V - V )
Ref
Equation 1
Ref
out
where V is the desired output voltage.
out
To avoid the discharge of the load, the resistor bridge R1, R2 should be highly resistive. For this type of
application, a total value of 100KΩ (or more) would be appropriate for the resistors R1 and R2.
As an example, with R2 = 100KΩ, V = 4.10V, V ) = 1.210V, then R1 = 41.9KΩ.
out
Ref
Note that if the low drop diode is inserted between the load and the voltage regulation resistor bridge to
avoid current flowing from the load through the resistor bridge, this drop should be taken into account in
the above calculations by replacing V by (V + V ).
drop
out
out
5.2 Current control
The current loop is controlled via the second trans-conductance operational amplifier, the sense resistor
R
, and the optocoupler.
sense
V
threshold is achieved externally by a resistor bridge tied to the V
voltage reference. Its middle
Ref
sense
point is tied to the positive input of the current control operational amplifier, and its foot is to be connected
to lower potential point of the sense resistor as shown on the following figure. The resistors of this bridge
are matched to provide the best precision possible.
The control equation verifies:
Rsense × Ilim = Vsense
Equation 2
R5 Vref
Vsense = -----------------------
(R4 + R5)
R5 Vref Rsense
Ilim = ---------------------------------------
Equation 3
(R4 + R5)
where I is the desired limited current, and V
is the threshold voltage for the current control loop.
lim
sense
Note that the R
resistor should be chosen taking into account the maximum dissipation (P
)
lim
sense
through it during full load operation.
Plim = Ilim × Vsense
Equation 4
5/10
TSM1014
Principles of Operation and Application Tips
Therefore, for most adapter and battery charger applications, a quarter-watt, or half-watt resistor to make
the current sensing function is sufficient.
The current sinking outputs of the two trans-conductance operational amplifiers are common (to the
output of the IC). This makes an ORing function which ensures that whenever the current or the voltage
reaches too high values, the optocoupler is activated.
The relation between the controlled current and the controlled output voltage can be described with a
square characteristic as shown in the following V/I output-power graph.
Figure 3: Output Voltage versus Output Current
Vout
Voltage regulation
TSM1014 Vcc : independent power supply
Secondary current regulation
Iout
0
TSM1014 Vcc : On power output
Primary current regulation
5.3 Compensation
The voltage-control trans-conductance operational amplifier can be fully compensated. Both its output
and negative input are directly accessible for external compensation components.
An example of a suitable voltage-control compensation network is shown in Figure 2 on page 4. It
consists of a capacitor Cvc1=2.2nF and a resistor Rcv1=22KΩ in series.
The current-control trans-conductance operational amplifier can be fully compensated. Both of its output
and negative input are directly accessible for external compensation components.
An example of a suitable current-control compensation network is also shown in Figure 2 on page 4. It
consists of a capacitor Cic1=2.2nF and a resistor Ric1=22KΩ in series.
5.4 Start-up and short circuit conditions
Under start-up or short-circuit conditions the TSM1014 is not provided with a high enough supply voltage.
This is due to the fact that the chip has its power supply line in common with the power supply line of the
system.
Therefore, the current limitation can only be ensured by the primary PWM module, which should be
chosen accordingly.
If the primary current limitation is considered not to be precise enough for the application, then a sufficient
supply for the TSM1014 has to be ensured under all conditions. For this, it would be necessary to add
some circuitry to supply the chip with a separate power line. This can be achieved in a number of ways,
including putting an additional winding on the transformer.
6/10
Principles of Operation and Application Tips
5.5 Voltage clamp
TSM1014
The following schematic shows how to realize a low-cost power supply for the TSM1014 (with no
additional windings).Please pay attention to the fact that in the particular case presented here, this low-
cost power supply can reach voltages as high as twice the voltage of the regulated line. Since the
Absolute Maximum Rating of the TSM1014 supply voltage is 28V. In the aim to protect he TSM1014
against such how voltage values a internal zener clamp is integrated.
Rlimit = (Vcc – Vz) Ivz
Figure 4: Clamp voltage
Vcc
Rlimit
Vcc
Ivz
Vz
TSM1014
28V
Figure 5: Voltage controller and over current detection schematic
OUT+
CV
OCP
D
Vcc
1
R2
Vref
To primary
28V
IL
R3
1k
R6
1K
Rvc1
5
4
7
CV Out
Cv-
CV
CC
22K
R4
Cvc1
100K
2.2nF
+
3
Cc+
CC Out
R1
+
Cc-
Gnd
Cic1
2.2nF
Ric1
22K
R5
10K
Ric2
1K
Vsense
OUT-
Rsense
IL
7/10
TSM1014
Package Mechanical Data
6 Package Mechanical Data
SO-8 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
A1
A2
B
1.35
0.10
1.10
0.33
0.19
4.80
3.80
1.75
0.053
0.069
0.25
1.65
0.51
0.25
5.00
4.00
0.04
0.010
0.065
0.020
0.010
0.197
0.157
0.043
0.013
0.007
0.189
0.150
C
D
E
e
1.27
0.050
H
5.80
0.25
0.40
6.20
0.50
1.27
0.228
0.010
0.016
0.244
0.020
0.050
h
L
k
˚ (max.)
8
ddd
0.1
0.04
0016023/C
8/10
Package Mechanical Data
TSM1014
9/10
TSM1014
Revision History
7 Revision History
Date
Revision
Description of Changes
01 July 2004
1
First Release
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 products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
All other names are the property of their respective owners
© 2004 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Repubic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
10/10
相关型号：
©2020 ICPDF网 联系我们和版权申明