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PDF EST7502C Data sheet ( Hoja de datos )
| Número de pieza | EST7502C | |
| Descripción | POWER SUPPLY SUPERVISOR | |
| Fabricantes | EST | |
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 1. PDF - POWER SUPPLY SUPERVISOR  Hay una vista previa y un enlace de descarga de EST7502C (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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EST7502C/EST7502CS
POWER SUPPLY SUPERVISOR WITH PWM CONTROLLER
Description
The EST7502C is designed with a pulse-width-modulation control circuit
and a complete power supervisor for use in the switched mode power
supply .
It contains various functions, like under voltage protection (UVP), over
voltage protection (OVP), power good output (PG) and ON/OFF control
(REM).
UVP(Under voltage protection) function is for +3.3V, +5V, +12V outputs.
OVP(Over voltage protection) function is for +3.3V, +5V, +12V and PT is
for extra protection input.
PG(Power good signal) is a safe operation signal to inform the external
parts.
REM(Remote on/off) is used to control the SMPS on/off. The REM control
signal has the on/off transferred debounce–time.
PIN CONFIGURATION (Top View)
FEATURE
■ 3-channel under voltage protection (UVP)
■ 3-channel over voltage protection (OVP)
■ 1-channel extra protection (PT)
■ 1-channel sense input to control the PG (SEN)
■ Remote on/off control function (REM)
■ Dual output for push-pull operation (OP1/OP2)
■ Soft start capability by external capacitor (SS)
■ VCC under voltage lockout
■ 16-Pin dual in-line package
■ Pb-free Package are available
ORDERING INFORMATION
ORDER NUMBER
EST7502C
EST7502C
Package
DIP-16 (Pb-free)
SOP-16(Pb-free)
REFERENCE APPLICATION CIRCUIT
Shipping
Tube
Tube
Top Marking
EST.7502C
EST.7502C
www.esthome.com
1
2012.5.1 Rev.A1.5 datasheet
1 page  
EST7502C
POWER SUPPLY SUPERVISOR WITH PWM CONTROLLER
APPLICATION HINTS
1. Input Impedence
Pin Name
V33
V5
V12
PT
Input Impedence
58KΩ
89KΩ
58KΩ
Pull-high to VCC= 33 KΩ
Pull-low to GND= 5.4 KΩ
2. Soft Start
3. PWM Frequency
Tpwm= K2 · RT
K2 = 1.3·10-10
Example.
RT = 100KΩ
Tpwm = (1.33·10-10) · (100 ·103 ) = 13.3us
Fpwm = 75KHz
4.PT
PT Voltage Level
PT>1.25V
PT<0.57V
Function
Over voltage protection
Disable under voltage check function
5.REM
In some application circuits, adding a resistor in series with the REM pin could reduce the noise spike and avoid
the pin from damage.
www.esthome.com
5 2012.5.1 Rev.A1.5 datasheet
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet EST7502C.PDF ] | |
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