VIPER27HD STMicroelectronics, VIPER27HD Datasheet - Page 16

• Manufacturer Part Number: VIPER27HD
• Description: IC OFFLINE CONV PWM OVP 16-SOIC
• Manufacturer: STMicroelectronics
• Series: VIPer™ plusr

Specifications of VIPER27HD

• Output Isolation: Isolated
• Frequency Range: 103 ~ 127kHz
• Voltage - Input: 8.5 ~ 23.5 V
• Voltage - Output: 800V
• Power (watts): 24W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Input Voltage: 8.5 V to 23.5 V
• Switching Frequency: 115 KHz
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Operation descriptions
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Figure 23. Timing diagram: normal power-up and power-down sequences
Figure 24. Soft-start: timing diagram
V
V
I
DRAIN_START
DD(RESTART)
DDch
V
DRAIN
V
(3mA)
V
DDoff
DDon
V
V
I
DD
DD
IN
Power-on
I
DRAIN
V
V
V
I
V
FBolp
Dlim
FBlin
OUT
FB
t
SS
( SOFT START- UP )
Doc ID 15133 Rev 5
Normal operation
DELAY (OLP)
STEADY STATE
regulation is lost here
Power-off
V
HV startup is no more activated
t
t
t
IN
< V
DRAIN_START
time
time
time
time
VIPER27