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L6591 Folha de dados(PDF) 26 Page - STMicroelectronics

Nome de Peças L6591
Descrição Electrónicos  PWM controller for ZVS half-bridge
PDF  32 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6591 Folha de dados(HTML) 26 Page - STMicroelectronics

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Summary of L6591 power management functions
L6591
26/32
1.
Use one external diode from SS (#14) to VREF (#10), cathode to VREF.
2.
The condition is latched as long as the IC is supplied; the HV generator is not invoked.
3.
All values are typical unless otherwise specified.
It is worth reminding that “auto-restart” means that the device will work intermittently as long
as the condition that is activating the function is not removed; “Latched” means that the
device is stopped as long as the unit is connected to the input power source and the unit
must be disconnected for some time from the source in order for the device (and the unit) to
restart.
Protection
Description
Caused by
IC
behavior
Vcc
restart
[V]
IC Iq
[mA]
VREF
[V]
SS
VCOMP
[V]
OSC
[V]
PFC_STOP
2nd OCP
Transformer
saturation or
shorted
secondary
diode
protection
VISEN >
1.5 V for 2
consecutive
switching
cycles
Latched
(2)
5
0.35
max
0
0
0
Stop
Active (low)
DISABLE
Externally
programmabl
e latched
protection
VDIS >
4.5 V
Latched
13
0.35
max
0
0
0
Stop
Active (low)
Brownout
Mains
undervoltage
protection
VLINE <
1.25 V
Auto
restart
5
0.35
max
00
0
Stop
Not active
(high Z)
Table 6.
Protections (continued)



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