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PDF ZXLD1371 Data sheet ( Hoja de datos )
| Número de pieza | ZXLD1371 | |
| Descripción | 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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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
REF
TADJ
SHP
STATUS
SGND
PGND
N/C
1
2
3
4
5
6
7
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.
16 GI
15 PWM
14 FLAG
13 ISM
12 VIN
11 VAUX
10 GATE
9 N/C
Typical Application Circuit
VIN 8V to 22V
C1
10µF
RGI2
75k
R4
1.8k
RGI1 TH1
24k 10k
ILED = 1A
R1
0R05
VAUX VIN
PWM
ISM
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
Buck-Boost Diagram Utilizing Thermistor and TADJ
ILED
100%
Rth REF
TH1 TADJ
10%
70°C 85°C
TLED
Thermal network response in Buck configuration with:
Rth = 1.8kΩ and TH1 = 10kΩ (beta = 3900)
Curve Showing LED Current vs. TLED
ZXLD1371
Document number: DS35436 Rev. 1 - 2
1 of 42
www.diodes.com
February 2012
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
ZXLD1371
Electrical Characteristics (Test conditions: VIN = VAUX = 12V, TA = 25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min Typ Max Units
Supply and reference parameters
VUV-
Under-Voltage detection threshold
Normal operation to switch disabled
VIN or VAUX falling (Note 8)
4.5 V
VUV+
Under-Voltage detection threshold
Switch disabled to normal operation
VIN or VAUX rising (Note 8)
4.9 V
IQ-IN
IQ-AUX
ISB-IN
ISB-AUX
VREF
ΔVREF
Quiescent current into VIN
Quiescent current into VAUX
Standby current into VIN.
Standby current into VAUX.
Internal reference voltage
Change in reference voltage with output
current
PWM pin floating.
Output not switching
PWM pin grounded
for more than 15ms
No load
Sourcing 1mA
Sinking 25µA
1.237
-5
1.5 3
150 300
90 150
0.7 10
1.25 1.263
5
mA
µA
µA
µA
V
mV
VREF_LINE Reference voltage line regulation
VREF-TC
Reference temperature coefficient
DC-DC converter parameters
IADJ ADJ input current (Note 9)
VGI
GI Voltage threshold for boost and buck-
boost modes selection (Note 9)
IGI GI input current (Note 9)
VIN = VAUX, 8.0V<VIN = <60V
VADJ ≤ 1.25V
VADJ = 5.0V
VADJ = 1.25V
VGI ≤ 1.25V
VGI = 5.0V
-60 -90
±50
dB
ppm/°C
100 nA
5 µA
0.8 V
100 nA
5 µA
IPWM
tPWMoff
PWM input current
PWM pulse width
(to enter shutdown state)
VPWM = 5.5V
PWM input low
36 100 µA
10 15 25 ms
TSDH
Thermal shutdown upper threshold
(GATE output forced low)
Temperature rising.
150 ºC
TSDL
Thermal shutdown lower threshold
(GATE output re-enabled)
Temperature falling.
125 ºC
High-Side Current Monitor (Pin ISM)
IISM
VSENSE_acc
VSENSE-OC
Input Current
Accuracy of nominal VSENSE threshold
voltage
Over-current sense threshold voltage
Measured into ISM pin VISM = 12V
VADJ = 1.25V
11 20
±0.25 ±2
300 350 375
µA
%
mV
Notes:
8. UVLO levels are such that all ZXLD1371 will function above 5.4V for rising supply voltages and function down to 5V for falling supply voltages.
9. The ADJ and GI pins have an internal clamp that limits the internal node to less than 3V. This provides some failsafe should those pins get
overdriven.
ZXLD1371
Document number: DS35436 Rev. 1 - 2
5 of 42
www.diodes.com
February 2012
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
Typical Characteristics – Buck Mode – RS =150mΩ - L = 33µH – ILED = 1.45A
700
600
TA = 25°C, VIN = VAUX,
L = 33µH, RS = 150mΩ
CIN = 100µF
400
ZXLD1371
300
200
1 LED
100
1 ~ 16 LEDs
0
5
1000
10 10
15 20 20 25 25 30
INPUT VOLTAGE (V)
30 35 40
900
800
700
600
500
400
300
200
4 LEDs
6 LEDs
100 2 LEDs
3 LEDs
5 LEDs
8 LEDs
10 LEDs
12 LEDs 14 LEDs
16 LEDs
0
5 10 15 20 25 30 35 40 45 50 55 60
VIN (V)
100
95
3 LEDs 4 LEDs 5 LEDs6 LEDs
2 LEDs
8 LEDs
10 LEDs
12 LEDs 14 LEDs 16 LEDs
90
85
80 1 LED
75
70
TA = 25°C, VIN = VAUX,
65 L = 33µH, RS = 150mΩ
CIN = 100µF
60
5
ZXLD1371
Document number: DS35436 Rev. 1 - 2
10 15 20 25 30 35 40 45 50 55 60
VIN (V)
11 of 42
www.diodes.com
February 2012
© Diodes Incorporated
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ZXLD1371.PDF ] | |
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