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PDF ZXLD1370Q Data sheet ( Hoja de datos )
| Número de pieza | ZXLD1370Q | |
| Descripción | AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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ZXLD1370Q
AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/
BOOST/BUCK-BOOST LED DRIVER-CONTROLLER
Description
The ZXLD1370Q 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.
Pin Assignments
TSSOP-16EP
The ZXLD1370Q 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 ZXLD1370Q 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.
The ZXLD1370Q has been qualified to AEC-Q100 Grade 1 and is
automotive grade supporting PPAPs.
Features
0.5% Typical Output Current Accuracy
6V to 60V Operating Voltage Range
LED Driver Supports Buck, Boost and Buck-Boost Configurations
Wide Dynamic Range Dimming
20:1 DC Dimming
1000:1 Dimming Range at 500Hz
Up to 1MHz Switching
High Temperature Control of LED Current Using TADJ
Available in Thermally Enhanced TSSOP-16EP Package with
Green Molding Compound
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Compliant
Qualified to AEC-Q100 Grade 1 and TS16949 Certification
Supports PPAP Documents (Note 4)
Typical Applications Circuit
VIN 8V
to 18V
C1
4.7µF
RGI2
62k
R4
RGI1 2k
51k
TH1
10k
GND
I LED = 1A
R1
0R1
VAUX VIN
PWM
ISM
L1
33mH
LED 1
to 4
GI SD1
PSD3100
ADJ GATE
Q1
REF
FLAG
DMN6068LK3
TADJ
SHP
C2
100pF
STATUS
SGND PGND
U1
ZXLD1370
Thermally connected
COUT
4.7µF
Buck-Boost Diagram Utilizing Thermistor and TADJ
Notes: 1.
2.
3.
4.
No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the
same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.
ZXLD1370Q
Document number: DS37117 Rev. 1 - 2
1 of 37
www.diodes.com
August 2015
© Diodes Incorporated
1 page  
ZXLD1370Q
,
Electrical Characteristics (Note 6) (VIN = VAUX =12V, TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Supply and Reference Parameters
VUV-
Under-Voltage detection threshold
Normal operation to switch disabled
VIN or VAUX falling
VUV+
Under-Voltage detection threshold
Switch disabled to normal operation
VIN or VAUX rising
IQ-IN
IQ-AUX
Quiescent current into VIN
Quiescent current into VAUX
PWM pin floating
Output not switching
ISB-IN
ISB-AUX
Standby current into VIN.
Standby current into VAUX.
PWM pin grounded
for more than 15ms
VREF
VREF
Internal reference voltage
Change in reference voltage with output
current
No load
Sourcing 1mA
Sinking 100µA
VREF_LINE Reference voltage line regulation
VREF-TC Reference temperature coefficient
DC-DC Converter Parameters
VIN = VAUX, 6.5V < VIN = < 60V
—
VADJ
External dc control voltage applied to ADJ pin DC brightness control mode
to adjust output current (Note 11)
10% to 200%
IADJ ADJ input current (Note 11)
VADJ ≤ 2.5V
VADJ = 5.0V
VGI
GI Voltage threshold for boost and buck-boost
modes selection (Note 11)
VADJ = 1.25V
IGI GI input current (Note 11)
VGI ≤ 2.5V
VGI = 5.0V
IPWM
PWM input current
VPWM = 5.5V
tPWMoff
TSDH
PWM pulse width (to enter shutdown state)
Thermal shutdown upper threshold
(GATE output forced low)
PWM input low
Temperature rising
TSDL
Thermal shutdown lower threshold
(GATE output re-enabled)
Temperature falling
High-Side Current Monitor (Pin ISM)
IISM Input Current
@ VISM = 12V
Buck
VSENSE Current measurement sinse voltage
Boost (Note 12)
VADJ = 1.25V
Buck-Boost (Note 12)
VSENSE_acc Accuracy of nominal VSENSE threshold voltage
VSENSE-OC Over-current sense threshold voltage
VADJ = 1.25V
Min Typ Max Units
5.2 5.6 6.3
V
5.5
—
—
—
—
1.237
-5
—
-60
—
6.0
1.5
150
90
0.7
1.250
—
—
-90
+/-50
6.5 V
3.0
300
150
10.0
1.263
—
5
—
—
mA
µA
µA
µA
V
mV
dB
ppm/°C
0.125
—
—
—
—
10
—
—
1.25
—
—
—
36
15
150
125
2.50
100
5
0.8
100
5
100
25
—
—
V
nA
µA
V
nA
µA
µA
ms
°C
°C
— 11 20
— 218 —
— 225 —
— ±0.25 ±2
300 350 375
µA
mV
%
mV
Notes: 11. 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.
12. Initial sense voltage in Boost and Buck-Boost modes at maximum duty cycle.
ZXLD1370Q
Document number: DS37117 Rev. 1 - 2
5 of 37
www.diodes.com
August 2015
© Diodes Incorporated
5 Page 
ZXLD1370Q
Typical Characteristics (cont.) Boost Mode – RS = 150mΩ, GIRATIO = 0.23, L = 33µH
0.400
0.350
0.300
0.250
0.200
0.150
TA = 25°C
VAUX = VIN
0.100
0.050
0.000
6.5
3 LEDs 4 LEDs 6 LEDs 8 LEDs 10 LEDs
12 LEDs
14 LEDs 16 LEDs
10 13.5 17 20.5 24 27.5 31 34.5 38 41.5 45 48.5
INPUT VOLTAGE (V)
Figure 15 ILED vs. Input Voltage & Number of LED
500
450
400
350
300
3 LEDs
TA = 25°C
VAUX = VIN
4 LEDs
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs 16 LEDs
250
200
150
100
50
Boosted voltage across
LEDs approaching VIN
6.5 10 13.5 17 20.5 24 27.5 31 34.5 38 41.5 45 48.5
INPUT VOLTAGE (V)
Figure 16 Frequency vs. Input Voltage & Number of LED
100
95
3 LEDs
4 LEDs
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
90
85
80
75
70
65
60
6.5
10
ZXLD1370Q
Document number: DS37117 Rev. 1 - 2
TA = 25°C
VAUX = VIN
13.5 17 20.5 24 27.5 31 34.5 38 41.5
INPUT VOLTAGE (V)
Figure 17 Efficiency vs. Input Voltage & Number of LED
11 of 37
www.diodes.com
45 48.5
August 2015
© Diodes Incorporated
11 Page | ||
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