ZXLD1374 데이터 시트보기 (PDF) - Diodes Incorporated.
부품명
상세내역
제조사
ZXLD1374
Diodes Incorporated.
ZXLD1374 Datasheet PDF : 39 Pages
| |||
A Product Line of
Diodes Incorporated
ZXLD1374
Electrical Characteristics (cont.) (VIN = VAUX = 12V, @TA = +25°C, unless otherwise specified.)
Symbol
Output Parameters
Parameter
Conditions
Min Typ Max Units
VFLAGL FLAG Pin Low Level Output Voltage
IFLAGOFF FLAG Pin Open-Drain Leakage Current
Output sinking 1mA
VFLAG = 40V
Normal operation
0.5
V
1
µA
4.2
4.5
4.8
Out of regulation (VSHP out of range)
(Note 12)
3.3
3.6
3.9
STATUS Flag No-Load Output Voltage
VSTATUS (Note 13)
RSTATUS Output Impedance of STATUS Output
Low Side Switch Output (LX pins tied together)
VIN under-voltage (VIN < 5.6V)
Switch stalled (tON or tOFF> 100µs)
LX over-voltage state (VLX > 60V)
Over-temperature (TJ > 125°C)
Excess sense resistor current
(VSENSE > 0.375V)
Excessive switch current (ISW>1.5A)
Normal operation
3.3
3.6
3.9
3.3
3.6
3.9
V
2.4
2.7
3.0
1.5
1.8
2.1
0.6
0.9
1.2
0.6
0.9
1.2
10
kΩ
ILX-LG Low Side Switch Leakage Current
Output stage off, VLX = 60V
(Note 14)
60
µA
RDS(ON) LX Pin MOSFET on Resistance
tPDHL Propagation Delay High-Low
tPDLH Propagation Delay Low-High
tLXR LX Output Rise Time
tLXF
LX Output Fall Time
tSTALL
Time to assert ‘STALL’ flag and
warning on STATUS output
(Note 15)
LED Thermal control circuit (TADJ) parameters
ILX = 1.5A (tON < 100µs)
VSENSE = 225mV ± 30%, CL = 680pF,
RL = 120Ω
LX low or high
0.5
0.8
Ω
86
ns
131
ns
208
ns
12
ns
100 170
µs
VTADJH Upper Threshold Voltage
VTADJL
ITADJ
Lower Threshold Voltage
TADJ Pin Input Current
Onset of output current reduction (VTADJ
falling)
560
625
690
mV
Output current reduced to <10% of set value
(VTADJ falling)
380
440
500
mV
VTADJ = 1.25V
1
µA
Notes:
12. Flag is asserted if VSHP<2.5V or VSHP>3.5V
13. In the event of more than one fault/warning condition occurring, the higher priority condition will take precedence. E.g. ‘Excessive coil current’
and ‘Out of regulation’ occurring together will produce an output of 0.9V on the STATUS pin. The voltage levels on the STATUS output assume
the Internal regulator to be in regulation and VADJ<=VREF. A reduction of the voltage on the STATUS pin will occur when the voltage on VIN is near –
this is due to the feedback loop increasing the sense voltage.
14. With the device still in switching mode the LX pin has an over-voltage detection circuit connected to it with a resistance of approximately 1MΩ.
15. If tON exceeds tSTALL, LX turns off and then an initiate a restart cycle occurs. During this phase, ADJ is grounded internally and the SHP pin is
switched to its nominal operating voltage, before operation is allowed to resume. Restart cycles will be repeated automatically until the operating
conditions are such that normal operation can be sustained. If tOFF exceeds tSTALL, the switch will remain off until normal operation is possible.
ZXLD1374
Document number: DS35032 Rev. 3 - 2
7 of 39
www.diodes.com
September 2012
© Diodes Incorporated
Share Link: