TSM1052 STMicroelectronics, TSM1052 Datasheet - Page 10

• 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
4.3
4.4
10/15
Figure 16. Output voltage versus output current
Compensation
The voltage control transconductance 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 compensation network is shown in
capacitor C
The current-control transconductance operational amplifier can be fully compensated. Both
its output and negative input are directly accessible for external compensation components.
An example of a suitable compensation network is shown in
capacitor C
stability of the application it is suggested to add a resistor in series with the optocoupler. An
example of a suitable R
Start up and short circuit conditions
Under start-up or short-circuit conditions if the device is supplied from SMPS output and the
output voltage is lower than Vcc minimum the current regulation is not guaranteed.
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 device has to be ensured under any condition. It would then
be necessary to add some circuitry to supply the chip with a separate power line. This can
be achieved in numerous ways, including an additional winding on the transformer.
The following schematic shows how to realize a low-cost power supply for the device (with
no additional windings).
VC1
IC1
= 2.2 nF and a resistor R
= 2.2 nF and a resistor R
Vout
Vout
LED
( Vcc of the device independent of output voltage)
( Vcc of the device independent
value could be 330 Ω in series with the optocoupler.
Voltage regulation
Voltage regulation
IC1
CV1
= 22 kΩ in series. In order to increase the
= 470 kΩ in series.
Current regulation
Current regulation
Figure 15.
Figure 15.
Iout
Iout
It consists of a
It consists of a
TSM1052