ZXLD1374_11 DIODES [Diodes Incorporated], ZXLD1374_11 Datasheet - Page 29

• Manufacturer Part Number: ZXLD1374_11
• Description: 60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST
• Manufacturer: DIODES [Diodes Incorporated]

ZXLD1374
Document number: DS35032 Rev. 2 - 2
In the event of more than one fault/warning condition occurring, the higher severity 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.
If V
reported. Hence, STATUS and FLAG are only guaranteed for V
Diagnostic signals should be ignored during the device start – up for 100μs. The device start up sequence will be initiated
both during the first power on of the device or after the PWM signal is kept low for more than 15ms, initiating the standby
state of the device.
In particular, during the first 100μs the diagnostic is signaling an over-current then an out-of-regulation status. These two
events are due to the charging of the inductor and are not true fault conditions.
Applications Information
ADJ
>1.7V, V
SENSE
may be greater than the excess coil current threshold in normal operation and an error will be
V
V
REF
REF
1.4
1.4
1.2
1.2
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
1
1
0
0
0
0
VR EF
(Continued)
0V
0A
4.5V
3.6V
2.7V
1.8V
0.9V
20
20
Operations
Figure 49. Diagnostic during Start-Up
current
current
Over-
Over-
Normal
60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST
0
40
40
60
60
Fig 48. Status levels
VAUX
UVLO
1
www.diodes.com
regulation
regulation
Out of
Out of
80
80
- VI N UVLO
- STALL
- OU T of REG
29 of 37
2
time (µs)
time (µs)
SEVERITY
LED DRIVER CONVERTER WITH AEC-Q100
100
100
ADJ
ZXLD1374
Switch OV
<=V
120
120
3
REF
Temperature
.
140
140
Over
4
Diodes Incorporated
160
160
A Product Line of
C urrent
Over
5
180
180
200
200
© Diodes Incorporated
ZXLD1374
March 2011