|
|
PDF VIPER37 Data sheet ( Hoja de datos )
| Número de pieza | VIPER37 | |
| Descripción | fixed frequency offline converter | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de VIPER37 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
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
1 page  
VIPER37
3 Pin settings
Figure 3. Connection diagram (top view)
Pin settings
'.$
6$$
#/.4
&"
"2
$2!).
$2!).
$2!).
$2!).
$2!).
Note:
The copper area for heat dissipation must be designed under the DRAIN pins.
Table 3. Pin description
Pin n. Name
Function
1
2
3
4
5
6...10
GND This pin represents the device ground and the source of the power section.
VDD
Supply voltage of the control section. This pin also provides the charging current
of the external capacitor during startup time.
CONT
Control pin. The following functions can be selected:
1. current limit set point adjustment. The internal set default value of the cycle-by-
cycle current limit can be reduced by connecting to ground an external resistor.
2. output voltage monitoring. A voltage exceeding the VOVP threshold (see
Table 8) shuts the IC down reducing the device consumption. This function is
stropped and digitally filtered for high noise immunity.
Control input for duty cycle control. Internal current generator provides bias
FB
current for loop regulation. A voltage below the threshold VFBbm activates the
burst mode operation. A level close to the threshold VFBlin means that we are
approaching the cycle-by-cycle overcurrent set point.
Brownout protection input with hysteresis. A voltage below the threshold VBRth
BR
shuts down (not latched) the device and lowers the power consumption. Device
operation restarts as the voltage exceeds the threshold VBRth + VBRhyst.
It can be connected to ground when not used.
High voltage drain pin. The built-in high voltage switched startup bias current is
DRAIN drawn from this pin too.
Pins connected to the metal frame to facilitate heat dissipation.
Doc ID 022218 Rev 1
5/35
5 Page 
VIPER37
Electrical data
Figure 4. Minimum turn-on time test circuit
14 V
3.5 V
GND
VDD
CONT
FB
BR
DRAIN
DRAIN
DRAIN
DRAIN
DRAIN
50 Ω
30 V
V(DRAIN)
90 %
TONmin
10 %
I(DRAIN)
IDLIM
Time
Time
Figure 5. Brownout threshold test circuits
14 V
2V
GND
VDD
CONT
IBRhyst
FB
BR
DRAIN
DRAIN
DRAIN
DRAIN
DRAIN
V(BR)
VBRth+VBRhyst
VBRth
VDIS
10 kΩ
I(BR)
30 V
IBRhyst
I(DRAIN)
Time
Time
Time
Figure 6. OVP threshold test circuits
14 V
GND
VDD
CONT
FB
BR
DRAIN
DRAIN
DRAIN
DRAIN
DRAIN
2V
V(CONT)
VOVP
10 kΩ
30 V
V(DRAIN)
Note:
Adjust VDD above VDDon startup threshold before setting to 14 V.
Time
Time
Doc ID 022218 Rev 1
11/35
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet VIPER37.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| VIPer31SP | BATTERY CHARGER PRIMARY IC | STMicroelectronics |
| VIPer35 | Quasi-resonant high performance off line high voltage converter | STMicroelectronics |
| VIPER37 | fixed frequency offline converter | STMicroelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |