zxld1320 Zetex Semiconductors plc., zxld1320 Datasheet - Page 6

• Manufacturer Part Number: zxld1320
• Description: Buck Mode Dc-dc Converter For Led Driving With 1.5a Output And Current Control
• Manufacturer: Zetex Semiconductors plc.

DC-DC converter output parameters
Switching NPN transistor
NOTES:
(b) Measured under pulse conditions.
(c) This current is measured via the collectors and emitters of the switch with these connected to ground (0V)
(d) Measured under pulse conditions. Peak Current = Ic
Issue 1 - January 2008
© Zetex Semiconductors plc 2008
Symbol
Toff(100)
Toff(10)
f
V
V
T
Symbol
I
I
I
V
V
h
C
t(on)
t(off)
SW
BON(max)
BON
LXmax
(POK)
FE
OH(POK)
OL(POK)
(BR)CE
CE(sat)
OBO
Discharge pulse width
Discharge pulse width
Parameter
Maximum operating
frequency
POK flag high level output
voltage
POK flag low level output
voltage
POK assertion delay time
Parameter
Average continuous switch
current
Maximum base current into
switch transistor from internal
drive circuit
Base current into switch
transistor using external
resistor (R
to ground
Collector-Emitter breakdown
voltage
Collector-Emitter saturation
voltage
Static forward current transfer
ratio
Output capacitance
Turn-on time
Turn-off time
(b)
BASE
(c)
) from BIAS pin
Conditions
100% Output current
10% Output current
4V<VIN<18V
Output sourcing 0.3µA
Output sinking 1mA
Switch permanently on
Conditions
4V<VIN<18V
BIAS pin at 0V
R
I
I
I
I
I
V
Ic=0 to I
V
I
C
C
C
C
C
C
BIAS
CB
IN
=10µA
=0.1A, I
=2A, I
=200mA, V
=2A, V
=2A to Ic<100µA
6
=10V
=10V,f=1MHz
= 1680Ω
B
C
CE
=50mA
=2A
B
=10mA
=2V
CE
=2V
(d)
Min
Min
300
0.7
30
20
4
2
0
Typ
500
Typ
120
209
116
1.2
50
10
50
64
30
28
ZXLD1320
8
www.zetex.com
Max
Max
VIN
600
700
1.7
0.4
1.5
12
70
Units
Units
KHz
mA
mA
mV
mV
µs
µs
pF
µs
ns
ns
A
V
V
V