Philips BUK218-50DC - Manual (Page 5)

Philips Semiconductors Product specification
TOPFET dual high side switch BUK218-50DC
UNDERVOLTAGE & OVERVOLTAGE CHARACTERISTICS
Limits are at -40˚C
≤
T
mb
≤
150˚C and typicals at T
mb
= 25˚C. Refer to TRUTH TABLE .
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Undervoltage
V
BG(UV)
Low supply threshold voltage 1 2 4.2 5.3 V
∆
V
BG(UV)
Hysteresis 0.1 0.5 1 V
Overvoltage
V
BG(OV)
High supply threshold voltage 2 35 40 45 V
∆
V
BG(OV)
Hysteresis 0.4 1 2 V
I
BG(OV)
Operating current per channel V
BG
> V
BG(OV)
- 1 2 mA
OVERLOAD PROTECTION CHARACTERISTICS
Independent protection per channel. Refer to TRUTH TABLE .
5.5 V
≤
V
BG
≤
35 V, limits are at -40˚C
≤
T
mb
≤
150˚C and typicals at T
mb
= 25˚C unless otherwise stated.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Overload protection V
BL
= V
BG
; t
p
= 300
µ
s
I
L(lim)
Load current limiting V
BG
≥
8 V 18 30 42 A
V
BG
= 5.5 V 15 27 42 A
Short circuit load protection T
mb
≤
125˚C prior to overload 3
P
D(TO)
Overload power threshold for protection 4 100 150 200 W
T
DSC
Characteristic time which determines trip time 5 - 200 500
µ
s
Overtemperature protection
T
j(TO)
Threshold junction temperature 150 170 190 ˚C
∆
T
j(TO)
Hysteresis 6 3 10 20 ˚C
1 Undervoltage sensors causes each channel to switch off and reset.
2 Overvoltage sensors causes each output channel to switch off to protect its load.
3 Above this temperature measurement of these parameters is prevented because OT protection may occur prior to SC protection.
4 Normal operation will be resumed when P
D
< P
D(TO)
and T
j
< T
j(TO)
.
5 Trip time t
d sc
varies with overload dissipation P
D
according to the exponential model formula t
d sc
≈
T
DSC
/ LN[ P
D
/ P
D(TO)
].
6 After cooling below the reset temperature the channel will resume normal operation.
October 2001 5 Rev 2.010