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ZXLD1356 Datenblatt(PDF) 3 Page - Diodes Incorporated

Teilenummer ZXLD1356
Bauteilbeschribung  High accuracy 550mA, 60V LED driver with internal switch
PDF  32 Pages
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Hersteller  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZXLD1356 Datenblatt(HTML) 3 Page - Diodes Incorporated

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ZXLD1356
Issue 2 - September 2008
3
www.zetex.com
© Diodes Incorporated 2008
www.diodes.com
Electrical characteristics (test conditions: VIN=24V, Tamb=25°C unless otherwise stated) (cont.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
VADJon
DC voltage on ADJ pin to switch
device from quiescent (off) state
to active (on) state
VADJ rising
0.2
0.25
0.3
V
RADJ
Resistance between ADJ pin
and VREF
0< VADJ < VREF
VADJ > VREF +100mV
30
10.4
50
14.2
65
18
k
k
ILXmean
Continuous LX switch current
0.55
A
RLX
LX Switch ‘On’ resistance
@ ILX = 0.55A
0.5
0.75
ILX(leak)
LX switch leakage current
5
A
DPWM(LF) Duty cycle range of PWM signal
applied to ADJ pin during low
frequency PWM dimming mode
PWM frequency <300Hz
PWM amplitude = VREF
Measured on ADJ pin
0.001
1
Brightness control range
1000:1
DCADJ (*)
NOTES:
(*) Ratio of maximum brightness to minimum brightness before shutdown VREF = 1.25/0.3. VREF externally driven to 2.5V,
ratio 10:1.
DC Brightness control range
See note (*)
5:1
TSS
Start up time
Time taken for output
current to reach 90% of
final value after voltage
on ADJ pin has risen
above 0.3V
Requires external
capacitor 22nF. See
graphs for more details
2ms
fLX
Operating frequency
(See graphs for more detail)
ADJ pin floating
L = 68 H (0.36 )
IOUT = 0.55A @ VLED =
3.6V
Driving 3 LEDs
360
kHz
TONmin
Minimum switch ‘ON’ time
LX switch ‘ON’
130 (†)
(†) Parameters are not tested at production. Parameters are guaranteed by design, characterization and process control.
ns
TOFFmin
Minimum switch ‘OFF’ time
LX switch ‘OFF’
70 (†)
ns
TPWmin_REC Recommended minimum switch
pulse width
LX switch 'ON' or ‘OFF’
800
ns
fLXmax
Recommended maximum
operating frequency
500
kHz
DLX
Recommended duty cycle range
of output switch at fLXmax
0.3
0.7



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