VIPER53SPTR-E STMicroelectronics, VIPER53SPTR-E Datasheet - Page 18

• Manufacturer Part Number: VIPER53SPTR-E
• Description: IC OFFLINE SWIT PWM CM POWERSO10
• Manufacturer: STMicroelectronics
• Series: VIPER™r

Specifications of VIPER53SPTR-E

• Output Isolation: Isolated
• Frequency Range: 93 ~ 300kHz
• Voltage - Input: 8.4 ~ 19 V
• Voltage - Output: 620V
• Power (watts): 40W
• Operating Temperature: 25°C ~ 125°C
• Package / Case: PowerSO-10 Exposed Bottom Pad
• Power Switch Family: VIPer53SP
• Input Voltage: 0 to 19V
• Power Switch On Resistance: 900mOhm
• Output Current: 1.6A
• Number Of Outputs: Single
• Mounting: Surface Mount
• Supply Current: 9mA
• Package Type: PowerSO
• Operating Temperature (min): -40C
• Operating Temperature (max): 150C
• Operating Temperature Classification: Automotive
• Pin Count: 10
• On Resistance (max): 0.9 Ohms
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• For Use With: 497-8435 - BOARD EVAL FOR VIPER53 28W497-6458 - BOARD EVAL BASED ON VIPER53-E497-6262 - BOARD REF SGL VIPER53 90-264VAC497-5866 - EVAL BOARD 24W NEG OUT VIPER53E497-4933 - BOARD PWR SUPPLY 24W OUTPUT VIPE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6173-2

Secondary feedback configuration example
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Since the dynamic characteristics of the converter are set on the secondary side through
components associated to U3, the compensation network has only a role of gain
stabilization for the optocoupler, and its value can be freely chosen. R5 can be set to a fixed
value of 1k , offering the possibility of using C7 as a soft start capacitor: When starting up
the converter, the VIPer53 device delivers a constant current of 0.6 mA on the COMP pin,
creating a constant voltage of 0.6V in R5 and a rising slope across C7. This voltage shape,
together with the operating range of 0.5V to 4.5V provides a soft start-up of the converter.
The rising speed of the output voltage can be set through the value of C7. The C4 and C6
values must be adjusted accordingly in order to ensure a correct start-up.
VIPer53 - E