Sharp 28JW-73H, Service Manual

Page: 24 / 41

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Note
1. Guaranteed by design.
Burst mode standby (pin 3)
V
th(burst)(on)
burst mode standby active threshold
voltage at I
burst
= 6 mA 3.3 3.8 4.3 V
I
th(burst)(on)
burst mode standby active current 16
− −
mA
I
th(burst)(off)
burst mode standby inactive current
− −
6 mA
t
(burst-blank)
burst mode standby blanking time 25 30 35
µ
s
Valley switch (pin 8)
∆
V/
∆
t
valley
∆
V/
∆
t for valley recognition
−
85
− +
85 V/
µ
s
t
valley-swon
delay from valley recognition to switch-on
−
150
(1)
−
ns
Current and short winding protection (pin 5)
V
sense(max)
maximum source voltage OCP
∆
V/
∆
t = 0.1 V/
µ
s 0.48 0.52 0.56 V
t
propagation
delay from detecting V
sense(max)
to
switch-off
∆
V/
∆
t = 0.5 V/
µ
s
−
140 185 ns
V
swp
short winding protection voltage 0.83 0.88 0.96 V
t
leb
blanking time for current and short
winding protection 300 370 440 ns
I
ss
soft start current V
sense
< 0.5 V 45 60 75
µ
A
Overvoltage protection (pin 4)
I
(OVP)(DEM)
OVP protection level at pin 4, set by the
demagnetization resistor R
DEM
; see
Section “OverVoltage Protection (OVP)”
54 60 66
µ
A
Overpower protection (pin 4)
I
(OPP)(DEM)
OPP current at pin 4, start of OPP
correction. Set by the demagnetization
resistor R
DEM
; see Section “OverPower
Protection (OPP)”
− −
24
− µ
A
I
(OPP50%)(DEM)
OPP current at pin 4 where maximum
source voltage is limited to 0.3 V
− −
100
− µ
A
Driver (pin 6)
I
source
source current capability of driver V
CC
= 9.5 V; V
DRIVER
= 2 V
− −
170
−
88 mA
I
sink
sink current capability of driver V
CC
= 9.5 V; V
DRIVER
= 2 V
−
300
−
mA
V
CC
= 9.5 V;
V
DRIVER
= 9.5 V
400 700
−
mA
V
o(driver)(max)
maximum output voltage of the driver V
CC
> 12 V
−
11.5 12 V
Temperature protection
T
prot(max)
maximum temperature threshold 130 140 150
°
C
T
prot(hyst)
hysteresis temperature
−
8
(1)
− °
C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT