TSM1051CD STMicroelectronics, TSM1051CD Datasheet - Page 9

• Manufacturer Part Number: TSM1051CD
• Description: IC CONTROLLER CC/CV SMPS 8SOIC
• Manufacturer: STMicroelectronics

Specifications of TSM1051CD

• Function: Charge Management
• Battery Type: All Battery Types
• Voltage - Supply: 2.5 V ~ 12 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Operating Supply Voltage: 2.5 V to 12 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-4478-5

TSM1051
5.2
5.3
Figure 10. Output voltage versus output current
Compensation
The voltage-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 compensation network is shown in
capacitor Cvc1 = 2.2 nF and a resistor Rcv1 = 470 kΩ in series.
The current-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 compensation network is shown in
capacitor Cic1 = 2.2 nF and a resistor Ric1 = 22 kΩ in series. In order to reduce the
dissipation of the device (especially with V
the stability of the application it is suggested to limit the current flowing in the OUT pin of the
device adding a resistor in series with the opto-coupler.
An example of a suitable R
V
Start up and short circuit conditions
Under start-up or short-circuit conditions the device 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 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).
CC
= 12 V.
Vout
LED
(Vcc of the device independent from output voltage)
value could be 330 Ω in series with the opto-coupler in case
Voltage regulation
CC
voltage values close to 12 V) and to increase
Figure 3.
Figure 3.
Iout
Application information
It consists of a
It consists of a
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