zxld1322 Zetex Semiconductors plc., zxld1322 Datasheet - Page 6

• Manufacturer Part Number: zxld1322
• Description: Buck/boost Mode Dc-dc Converter For Led Driving With 700ma Output And Current Control
• Manufacturer: Zetex Semiconductors plc.

DC-DC convertertoutput parameters
Switching NPN transistor
NOTES:
(c) Measured under pulse conditions.
(d) This current is measured via the collectors and emitters of the switch with these connected to ground (0V)
(e) Measured under pulse conditions. Peak Current = Ic
Issue 1 - January 2008
© Zetex Semiconductors plc 2008
Symbol
Toff(100)
Toff(10)
f
f
Symbol
I
I
I
V
V
h
C
t(on)
t(off)
SW
BON(max)
BON
LXmax
SU
FE
(BR)CE
CE(sat)
OBO
Discharge pulse width
Discharge pulse width
Parameter
Maximum operating
frequency
Switching frequency in start-
up mode
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
(c)
BASE
(d)
) from BIAS pin
Conditions
100% output current
10% output current
VIN=1.2V
Conditions
2V<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
(e)
Min
Min
0.7
30
15
4
Typ
Typ
120
209
116
1.2
50
50
10
50
64
30
28
ZXLD1322
8
www.zetex.com
Max
Max
600
1.7
12
70
2
Units
Units
KHz
KHz
mA
mA
mV
mV
µs
pF
µs
ns
ns
A
V