VIPER53EDIP-E STMicroelectronics, VIPER53EDIP-E Datasheet - Page 17

• Manufacturer Part Number: VIPER53EDIP-E
• Description: IC OFFLINE SWIT PWM CM OTP 8DIP
• Manufacturer: STMicroelectronics
• Series: VIPER™r

Specifications of VIPER53EDIP-E

• Output Isolation: Isolated
• Frequency Range: 93 ~ 300kHz
• Voltage - Input: 8.4 ~ 19 V
• Voltage - Output: 620V
• Power (watts): 30W
• Operating Temperature: 25°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• 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 VIPER53E497-5865 - EVAL BOARD 24W POS OUT VIPER53E497-4933 - BOARD PWR SUPPLY 24W OUTPUT VIPE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6172-5

VIPer53EDIP - E / VIPer53ESP - E
The lowest load gives another condition for stability: The frequency F
encounter the third order slope generated by the load pole, the R1-C1 network on the
COMP pin and the R2-C2 network at the level of the TL431 on secondary side. This
condition can be met by adjusting both C
The above formula gives a minimum value for C1. It can be then increased to provide a
natural soft start function as this capacitor is charged by the current I
with:
C
2
C
DocRev1
1
---------------------------------------------- -
6.3
---------------------------------- -
6.3
R
R L1 C OUT
P
L1
G
-------- - R
OUT1
1
R
O
4
G O
-------- - R 1
and C2 values:
R 4
C
OUT
1
=
2
V
------------------ -
R
R
2
2
OUT
L1
P
-------------------- -
P MAX
OU T1
P OU T1
-------------------- -
P
MAX
Regulation Loop Stability
COMP
BW1
must not
at start-up.
17/31