Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Compliant
Qualified to AEC-Q100 Grade 1 and TS16949 Certification
PPAP Capable (Note 4)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q101 qualified and are PPAP capable. Refer to https://www.diodes.com/quality/.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.
Package Thermal Data
Thermal Resistance
Junction-to-Ambient,
JA
(Note 7)
Junction-to-Case,
JC
Note:
Package
TSSOP-16EP
TSSOP-16EP
Typical
50
23
Unit
°
C/W
°
C/W
7. Measured on High Effective Thermal Conductivity Test Board" according JESD51.
Recommended Operating Conditions
Symbol
V
IN
Parameter
Input Supply Voltage Range
Performance/Comment
Normal Operation
Reduced Performance Operation
(Note 8)
Normal Operation
Reduced Performance Operation
(Note 8)
—
V
VIN
-V
ISM
, with 0 ≤ V
ADJ
≤ 2.5V
DC Brightness Control Mode from
10% to 200%
REF Sourcing Current
—
—
To Achieve 1000:1 Resolution
To Achieve 500:1 Resolution
PWM Input High or Low
—
—
—
—
Ratio = V
GI
/V
ADJ
Min
8
6.3
8
6.3
6.3
0
0.125
—
300
0
100
100
0.002
2
0
-40
-40
0.20
60
60
450
2.5
1
1,000
V
REF
500
1,000
10
5.5
0.4
+125
+125
0.50
V
V
mV
V
mA
kHz
V
Hz
Hz
ms
V
V
°
C
°
C
—
60
V
Max
Unit
V
AUX
V
ISM
V
SENSE
V
ADJ
I
REF
f
MAX
V
TADJ
f
PWM
t
PWMH/L
V
PWMH
V
PWML
T
J
T
A
GI
Notes:
Auxiliary Supply Voltage Range (Note 9)
Current Sense Monitor Input Range
Differential Input Voltage
External DC Control Voltage Applied to ADJ Pin to
Adjust Output Current
Reference External Load Current
Recommended Switching Frequency Range
(Note 10)
Temperature Adjustment (T
ADJ
) Input Voltage Range
Recommended PWM Dimming Frequency Range
PWM Pulse Width in Dimming Mode
PWM Pin High-Level Input Voltage
PWM Pin Low-Level Input Voltage
Junction Temperature Range
Ambient Temperature Range
Gain Setting Ratio for Boost and Buck-Boost Modes
8. Device starts up above 6V and as such the minimum applied supply voltage has to be above 6.5V (plus any noise margin). The ZXLD1370Q will,
however, continue to function when the input voltage is reduced from ≥ 8V down to 6.3V. When operating with input voltages below 8V, the output
current and device parameters may deviate from their normal values; and is dependent on power MOSFET switch, load and ambient temperature
conditions. To ensure best operation in Boost and Buck-Boost modes with input voltages, V
IN
, between 6.3 and 8V a suitable boot-strap network on
VAUX pin is recommended. Performance in Buck mode will be reduced at input voltages (V
IN
, V
AUX
) below 8V. – a boot-strap network cannot be
implemented in buck mode and so a suitable low V
T
MOSFET should be selected.
9. V
AUX
can be driven from a voltage higher than V
IN
to provide higher efficiency at low V
IN
voltages, but to avoid false operation; a voltage should not be
applied to V
AUX
in the absence of a voltage at V
IN
.
10. The device contains circuitry to control the switching frequency to approximately 400kHz. The maximum and minimum operating frequency is not tested
External DC Control Voltage Applied to ADJ Pin DC Brightness Control Mode
to Adjust Output Current (Note 11)
10% to 200%
ADJ Input Current (Note 11)
V
ADJ
≤ 2.5V
V
ADJ
= 5.0V
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
GI Voltage Threshold for Boost and Buck-boost
V
ADJ
= 1.25V
Modes Selection (Note 11)
GI Input Current (Note 11)
PWM Input Current
PWM Pulse Width (to enter shutdown state)
V
GI
≤ 2.5V
V
GI
= 5.0V
V
PWM
= 5.5V
PWM Input Low
Temperature Rising
Temperature Falling
Thermal Shutdown Upper Threshold
(GATE Output Forced Low)
Thermal Shutdown Lower Threshold
T
SDL
(GATE Output Re-enabled)
High-Side Current Monitor (Pin ISM)
I
ISM
V
SENSE
Input Current
Current Measurement Sense Voltage
@ V
ISM
= 12V
Buck
Boost (Note 12)
V
ADJ
= 1.25V
Buck-Boost (Note 12)
V
ADJ
= 1.25V
—
—
—
—
300
11
218
225
±0.25
350
20
—
—
±2
375
µA
mV
%
mV
V
SENSE_ACC
Accuracy of Nominal V
SENSE
Threshold Voltage
V
SENSE-OC
Notes:
Overcurrent Sense Threshold Voltage
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.
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