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NXP Semiconductors
SSL21081T/2T/3T/4T
GreenChip drivers for LED lighting
Table 7.
Characteristics …continued
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Current and SWP
V th(ocp)SOURCE
t d(ocp-swoff)
overcurrent protection threshold
voltage on pin SOURCE
delay time from overcurrent
? V/ ? t = 0.1 V/ ? s
? V/ ? t = 0.1 V/ ? s; V NTC = 0.325 V
? V/ ? t = 0.1 V/ ? s
480
230
-
500
250
75
520
270
100
mV
mV
ns
protection to switch-off
t leb
? t leb
leading edge blanking time
leading edge blanking time
overcurrent protection
short-winding protection
between t leb for overcurrent
260
210
30
300
250
50
340
290
-
ns
ns
ns
difference
protection and short-winding
protection
V th(swp)SOURCE
short-winding protection threshold
1.4
1.5
1.6
V
voltage on pin SOURCE
Valley detection
( ? V/ ? t) vrec
valley recognition voltage change on pin DRAIN
? 30
? 20
? 10
V/ ? s
with time
f ring
? V vrec(min)
ringing frequency
minimum valley recognition
voltage drop on pin DRAIN
[2]
200
15
550
20
1000
25
kHz
V
voltage difference
t d(vrec-swon)
valley recognition to switch-on
-
100
-
ns
delay time
Brownout detection
V th(TONMAX)
threshold voltage on pin
3.75
4
4.25
V
TONMAX
I offset(TONMAX)
t on(high)
offset current on pin TONMAX
high on-time
? 37
12.5
? 43
15
? 48
17.5
? A
? s
MOSFET output stage
V BR(DRAIN)
breakdown voltage on pin DRAIN 600 V version; T j > 0 ? C
300 V version; T j > 0 ? C
600
300
-
-
-
-
V
V
R DSon
drain-source on-state resistance
600 V version; T j = 25 ? C
600 V version; T j = 125 ? C
300 V version; T j = 25 ? C
300 V version; T j = 125 ? C
4
6
2.05
3.05
5
7.5
2.3
3.45
6
9
2.55
3.85
?
?
?
?
? dV/dt) f(DRAIN)
fall rate of change of voltage on
pin DRAIN
300 V version; C DRAIN = 150 pF,
R SOURCE = 2.2 ?
[2]
-
1.2
-
V/ns
600 V version; C DRAIN = 75 pF,
R SOURCE = 1.2 ?
-
1.5
-
V/ns
NTC functionality
V th(high)NTC
high threshold voltage on pin
0.47
0.5
0.53
V
NTC
V th(low)NTC
V act(tmr)NTC
low threshold voltage on pin NTC
timer activation voltage on pin
0.325
0.26
0.35
0.29
0.375 V
0.325 V
NTC
V deact(tmr)NTC
timer deactivation voltage on pin
0.17
0.2
0.23
V
NTC
SSL21081T_2T_3T_4T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3.1 — 22 February 2012
? NXP B.V. 2012. All rights reserved.
14 of 23
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