TSM1052 STMicroelectronics, TSM1052 Datasheet - Page 8

• Manufacturer Part Number: TSM1052
• Description: IC CONTROLLER CC/CV SMPS SOT23-6
• Manufacturer: STMicroelectronics

Specifications of TSM1052

• Function: Charge Management
• Battery Type: All Battery Types
• Voltage - Supply: 1.7 V ~ 18 V
• Operating Temperature: -10°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: Yes
• Operating Supply Voltage (max): 18V
• Output Current: 100mA
• Output Voltage: -0.3 to 18V
• Synchronous Pin: No
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 6
• Package Type: SOT-23
• Number Of Outputs: Single Output
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 10 C
• Mounting Style: SMD/SMT
• For Use With: 497-8408 - BOARD EVAL LD6562AD/TSM1052497-6242 - BOARD EVAL FOR TSM1052
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6034-2

Application information
4
4.1
4.2
4.2.1
8/15
Application information
Typical application schematic
Figure 15. Typical adapter or battery charger application using the device
In the above application schematic, the device is used on the secondary side of a flyback
adapter (or battery charger) to provide an accurate control of voltage and current. The
above feedback loop is made with an optocoupler.
Voltage and current control
Voltage control
The voltage loop is controlled via a first transconductance operational amplifier, the voltage
divider R
choose the values of R1 and R2 resistors using Equation 1:
Equation 1
where Vout is the desired output voltage.
As an example, with R1 = 100 kΩ and R2 = 27 kΩ, V
1
, R
2
, and the optocoupler which is directly connected to the output. Its possible to
a)
b)
TSM1052
TSM1052
200 mV
200 mV
1.210 V
1.210 V
+
+
Ictrl
Ictrl
4
4
R
V
1
out
Rsense
Rsense
Vsense
Vsense
=
Iout
Iout
R
=
+
+
+
+
-
-
-
-
2
V
5
5
⋅
ref
V (
Vcc
Vcc
6
6
⋅
out
R (
Ric2
Ric2
V
1
−
ref
R
+
3
3
1
1
2
2
V
2
R
OUT
ref
2
Vctrl
Vctrl
GND
GND
OUT
OUT
)
)
= 5.7 V
Ric1
Ric1
Rled
Rled
Cvc1
Cvc1
Cic1
Cic1
Rvc1
Rvc1
R1
R1
R2
R2
TSM1052
Vout
Vout