ZXLD1371 View Datasheet(PDF) - Diodes Incorporated.
Part Name
Description
Manufacturer
ZXLD1371 Datasheet PDF : 42 Pages
| |||
A Product Line of
Diodes Incorporated
ZXLD1371
60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER
Description
Pin Assignments
The ZXLD1371 is an LED driver controller IC for driving
external MOSFETs to drive high current LEDs. It is a multi-
topology controller enabling it to efficiently control the current
through series connected LEDs. The multi-topology enables it
to operate in buck, boost and buck-boost configurations.
The 60V capability coupled with its multi-topology capability
enables it to be used in a wide range of applications and drive
in excess of 15 LEDs in series.
The ZXLD1371 is a modified hysteretic controller using a
patent pending control scheme providing high output current
accuracy in all three modes of operation. High accuracy
dimming is achieved through DC control and high frequency
PWM control.
The ZXLD1371 uses two pins for fault diagnosis. A flag output
highlights a fault, while the multi-level status pin gives further
information on the exact fault.
ADJ 1
REF 2
TADJ 3
SHP 4
STATUS 5
SGND 6
PGND 7
N/C 8
TSSOP-16EP
Features
• 0.5% typical output current accuracy
• 5 to 60V operating voltage range
• LED driver supports Buck, Boost and Buck-boost
• configurations
• Wide dynamic range dimming
o 10:1 DC dimming
o 1000:1 dimming range at 500Hz
• Up to 1MHz switching
• High temperature control of LED current using TADJ
• Available in Automotive Grade with AEC-Q100 and
TS16949 certification
• Available in “Green” Molding Compound (No Br, Sb) with
lead Free Finish/ RoHS Compliant (Note 1)
Note 1: EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2). All applicable
RoHS exemptions applied.
Typical Application Circuit
VIN 8V to 22V
C1
10µF
RGI2
75k
R4
1.8k
RGI1 TH1
24k 10k
ILED = 1A
R1
0R05
VAUX VIN
ISM
PWM
L1
33µH
D1
PDS3100
GI
ADJ ZXLD1371 GATE
REF
FLAG
TADJ
STATUS
SHP NC SGND PGND
Q1
DMN6068LK3
1 to 6
LEDs
COUT
10µF
C2
330pF
Thermally connected
16 GI
15 PWM
14 FLAG
13 ISM
12 VIN
11 VAUX
10 GATE
9 N/C
Buck-Boost Diagram Utilizing Thermistor and TADJ
ZXLD1371
Document number: DS35436 Rev. 1 - 2
1 of 42
www.diodes.com
Curve Showing LED Current vs. TLED
February 2012
© Diodes Incorporated
Share Link: 