VIPER28LDTR STMicroelectronics, VIPER28LDTR Datasheet - Page 3

• Manufacturer Part Number: VIPER28LDTR
• Description: OFFLINE POWER SUPPLY
• Manufacturer: STMicroelectronics
• Series: VIPer™ plusr

Specifications of VIPER28LDTR

• Output Isolation: Isolated
• Frequency Range: 54 ~ 66kHz
• Voltage - Input: 8.5 V ~ 23.5 V
• Voltage - Output: 800V
• Power (watts): 20W
• Operating Temperature: -25°C ~ 125°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

VIPER28
1
2
Table 2.
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 heat sinking.
Figure 2.
CONT
CONT
EPT
Tovl
Tovl
Part number
VIPER28
OVP DETECTION
OVP DETECTION
Block diagram
Typical power
Typical power
Block diagram
LOGIC
LOGIC
OVP
OVP
EPT
BLOCK
BLOCK
START
START
SOFT
SOFT
LEB
LEB
Tov l
Tov l
FB
FB
OLP
OLP
BLOCK
BLOCK
BLOCK
BLOCK
OCP
OCP
PWM
PWM
Adapter
18 W
(1)
+
+
+
+
-
-
-
-
+
+
-
-
BURST-MODE
BURST-MODE
OSCILLATOR
OSCILLATOR
230 V
OCP
OCP
LOGIC
LOGIC
PWM
PWM
Disable
Disable
Doc ID 15028 Rev 4
AC
Open frame
BURST
BURST
Ref erence Voltages
Ref erence Voltages
Internal Supply bus
Internal Supply bus
20 W
2nd OCP
2nd OCP
BURST
BURST
&
&
+
+
-
-
VDD
(2)
TURN-ON
TURN-ON
LOGIC
LOGIC
LEB
LEB
2nd OCP
2nd OCP
LOGIC
LOGIC
SUPPLY
SUPPLY
& UVLO
& UVLO
S
S
R
R
Adapter
Q
Q
10 W
OTP
OTP
UVLO
UVLO
OVP
OVP
(1)
OLP
OLP
85-265 V
HV_ON
HV_ON
SHUTDOWN
SHUTDOWN
Q
Q
OTP
OTP
THERMAL
THERMAL
R
R
S
S
I
DDch
AC
HV_ON
HV_ON
Open frame
Block diagram
Rsense
Rsense
12 W
DRAIN
DRAIN
GND
GND
(2)
3/32