VIPER28HE STMicroelectronics, VIPER28HE Datasheet - Page 16

• Manufacturer Part Number: VIPER28HE
• Description: Switching Converters, Regulators & Controllers VIPer28 Rugged 800V Fixed freq 115 kHz
• Manufacturer: STMicroelectronics

Specifications of VIPER28HE

• Output Voltage: 800 V
• Output Current: 3 A
• Output Power: 20 W
• Input Voltage: 8.5 V to 23.5 V
• Switching Frequency: 115 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Package / Case: SDIP-10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Operation descriptions
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Figure 19. Timing diagram: normal power-up and power-down sequences
Figure 20. 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
FBolp
I
V
FBlin
OUT
Dlim
FB
Regulated value
t
SS
Doc ID 15028 Rev 4
(soft start)
Normal operation
T
OLP-delay
regulation is lost here
Power-off
t
t
t
V
HV startup is no more activated
IN
< V
DRAIN_START
time
time
time
time
VIPER28