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부품번호 | VIPER37 기능 |
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기능 | fixed frequency offline converter | ||
제조업체 | STMicroelectronics | ||
로고 | |||
전체 30 페이지수
VIPER37
VIPerPlus family: fixed frequency offline converter
Features
■ 800 V avalanche rugged power section
■ PWM operation with adjustable limiting current
■ 30 mW standby power at 265 Vac
■ Operating frequency:
– 60 kHz for L type
– 115 kHz for H type
■ Frequency jittering for low EMC
■ Output overvoltage protection
■ High primary current protection (2nd OCP)
■ Input undervoltage setting (brownout)
■ Onboard soft-start
■ Safe auto-restart after a fault condition
■ Hysteretic thermal shutdown
Applications
■ SMPS for set-top boxes, DVD players and
recorders, white goods
■ Auxiliary power supply for consumer and home
equipment
■ ATX auxiliary power supply
■ Low / medium power AC-DC adapters
SDIP10
Description
This device is an offline converter with an 800 V
rugged power section, a PWM control, two levels
of overcurrent protection, overvoltage and
overload protection, hysteretic thermal protection,
soft-start, and safe auto-restart after the removal
of any fault condition. Burst mode operation and
very low device consumption help to meet the
standby energy saving regulations.
Advance frequency jittering reduces EMI filter
costs. Brownout function protects the switch
mode power supply when the rectified input
voltage level is below the normal minimum level
specified for the system. The high voltage startup
circuit is embedded in the device.
Figure 1. Typical topology
+
DC input high voltage
wide range
DRAIN DRAIN DRAIN DRAIN DRAIN
VIPER37
GND VDD CONT FB
BR
+
DC Output voltage
-
Table 1.
Device summary
Order codes
VIPER37LE
VIPER37HE
February 2012
Package
SDIP10
Doc ID 022218 Rev 1
Packaging
Tube
1/35
www.st.com
35
Block diagram
1 Block diagram
VIPER37
Figure 2. Block diagram
BR
VVVDDDcDc
DRAIN
CONT
15uA
OVP
LOGIC
OVP
+
-
VBRth
SOFT
START
.
Vin_OK
OCP
BLOCK
6uA
Internal Supply bus
&
Ref erence Voltages
OCP
+ PWM
-
SUPPLY
& UVLO
HV_ON Istart-up
UVLO
OSCILLATOR
BURST TURN-ON
LOGIC
THERMAL
SHUTDOWN
OTP
S
Q
LEB R1 R2
+
-
Ref
2nd OCP
LOGIC
OLP OVP OTP
BURST-MODE
LOGIC
BURST
Rsense
FB GND
2 Typical power
Table 2. Typical power
Part number
230 VAC
Adapter(1)
Open frame(2)
85-265 VAC
Adapter(1)
Open frame(2)
VIPER37
23 W
25 W
13 W
15 W
1. Typical continuous power in non-ventilated enclosed adapter measured at 50 ° C ambient.
2. Maximum practical continuous power in an open frame design at 50 ° C ambient, with adequate heatsinking.
4/35 Doc ID 022218 Rev 1
4페이지 VIPER37
Electrical data
4.3
Electrical characteristics
(TJ = -25 to 125 °C, VDD = 14 V(a); unless otherwise specified).
Table 6. Power section
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
VBVDSS Breakdown voltage
IDRAIN = 1 mA, VFB = GND
TJ = 25 °C
800
V
IOFF
OFF state drain current
VDRAIN = max. rating,
VFB = GND, TJ = 25 °C
60 µA
RDS(on)
Drain-source on state
resistance
IDRAIN = 0.4 A, VFB = 3 V,
VBR = GND, TJ = 25 °C
IDRAIN=0.4 A,VFB =3V,
VBR = GND, TJ = 125 °C
4.5 Ω
9Ω
COSS
Effective (energy related) VDRAIN = 0 to 640 V,
output capacitance
TJ = 25 °C
17 pF
a. Adjust VDD above VDDon startup threshold before setting to 14 V.
Doc ID 022218 Rev 1
7/35
7페이지 | |||
구 성 | 총 30 페이지수 | ||
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |