ZXLD1374EST20TC Diodes Inc, ZXLD1374EST20TC Datasheet - Page 28

• Manufacturer Part Number: ZXLD1374EST20TC
• Description: LED Drivers 60V 1.5A LED Driver Converter IC
• Manufacturer: Diodes Inc

Specifications of ZXLD1374EST20TC

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ZXLD1374
Document number: DS35032 Rev. 2 - 2
Applications Information
Over-Temperature Shutdown
The ZXLD1374 incorporates an over-temperature shutdown circuit to protect against damage caused by excessive die
temperature. A warning signal is generated on the STATUS output when die temperature exceeds 125°C nominal and the
output is disabled when die temperature exceeds 150°C nominal. Normal operation resumes when the device cools back
down to 125°C.
FLAG/STATUS Outputs
The FLAG/STATUS outputs provide a warning of extreme operating or fault conditions. FLAG is an open-drain logic output,
which is normally high resistance, but switches low resistance to indicate that a warning, or fault condition exists. STATUS
is a DAC output, which is normally high (4.5V), but switches to a lower voltage to indicate the nature of the warning/fault.
Conditions monitored, the method of detection and the nominal STATUS output voltage are given in the following table:
Table 2
Notes: 13. Severity 1 denotes lowest severity.
Sense resistor current I
Driver stalled with switch ‘on’, or
Output current out of regulation
Average switch current greater
Device temperature above
Warning/Fault condition
maximum recommended
Supply under-voltage
Switch over-voltage
specified maximum
14. This warning will be indicated if the output power demand is higher than the available input power; the loop may not be able
15. This warning will be indicated if the LX pin stays at the same level for greater than 100us (e.g. the internal transistor cannot
Normal operation
operating value
‘off’ (Note 15)
to maintain regulation.
pass enough current to reach the upper switching threshold).
than 1.5A
(Note 14)
RS
above
(Note 13)
Severity
(Continued)
1
2
2
2
3
4
5
5
60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST
V
t
SHP
ON
LX voltage > 60V
V
voltage range
SENSE
www.diodes.com
parameters
, or t
Monitored
V
I
T
V
outside normal
LX
AUX
J
IN
>125°C
OFF
> 1.5A
<5.6V
28 of 37
<5.6V
>0.375V
LED DRIVER CONVERTER WITH AEC-Q100
>100µs
FLAG
H
L
L
L
L
L
L
L
L
Diodes Incorporated
A Product Line of
Nominal STATUS voltage
4.5
4.5
3.6
3.6
3.6
2.7
1.8
0.9
0.9
© Diodes Incorporated
ZXLD1374
March 2011