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ZXLD1371Q PDF даташит

Спецификация ZXLD1371Q изготовлена ​​​​«Diodes» и имеет функцию, называемую «AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER».

Детали детали

Номер произв ZXLD1371Q
Описание AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER
Производители Diodes
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ZXLD1371Q Даташит, Описание, Даташиты
ZZXXLLDD11337711QQ
AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/
BOOST/BUCK-BOOST LED DRIVER-CONTROLLER
Description
The ZXLD1371Q 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 ZXLD1371Q 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 ZXLD1371Q 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 ZXLD1371Q has been qualified to AEC-Q100 Grade 1 and is
Automotive Grade supporting PPAPs.
Pin Assignments
ADJ
REF
TADJ
SHP
STATUS
SGND
PGND
N/C
1
2
3
4
5
6
7
8
TSSOP-16EP
16 GI
15 PWM
14 FLAG
13 ISM
12 VIN
11 VAUX
10 GATE
9 N/C
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
10:1 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 Grade
Qualified to AEC-Q100 Standards for High Reliability
TS16949 Certification
PPAP Capable (Note 4)
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
GI
ISM
L1
33µH D1
PDS3100
ADJ ZXLD1371 GATE
REF
TADJ
FLAG
STATUS
SHP NC SGND PGND
Q1
DMN6068LK3
1 to 6
LEDs
COUT
10µF
C2
330pF
Thermally connected
Buck-Boost Diagram Utilizing Thermistor and TADJ
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. 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.
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-Q100 qualified and are PPAP capable. Refer to http://www.diodes.com/quality/product_compliance_definitions/.
ZXLD1371Q
Document number: DS37116 Rev. 3 - 2
1 of 42
www.diodes.com
February 2017
© Diodes Incorporated









No Preview Available !

ZXLD1371Q Даташит, Описание, Даташиты
Functional Block Diagram
LOAD
D
VIN RS
L
R1
R2
VAUX VIN
ISENSE
FLAG
STATUS
Error
report
Fast
current
monitor
TADJ
Accurate
current
monitor
REF Reference
GI
ADJ
Error amp
-
Demand
current
source
Frequency &
hysteresis
control
VAUX
COMPIN
+
-
Gate
driver
PWM
SGND
PGND
ZZXXLLDD11337711QQ
Pin Descriptions
Pin Name Pin
ADJ 1
REF
TADJ
2
3
SHP
4
STATUS
5
Type
(Note 5)
I
O
I
I/O
O
Description
Adjust Input (for DC output current control)
Connect to REF to set 100% output current.
Drive with DC voltage (125mV<VADJ< 1.25V) to adjust output current from 10% to 100% of set
value. The ADJ pin has an internal clamp that limits the internal node to less than 3V. This provides
some failsafe should they get overdriven
Internal 1.25V Reference Voltage Output
Temperature Adjust input for LED thermal current control
Connect thermistor/resistor network to this pin to reduce output current above a preset temperature
threshold. Connect to REF to disable thermal compensation function. (See section on thermal
control.)
Shaping Capacitor for Feedback Control Loop
Connect 330pF ±20% capacitor from this pin to ground to provide loop compensation
Operation Status Output (analog output)
Pin is at 4.5V (nominal) during normal operation.
Pin switches to a lower voltage to indicate specific operation warnings or fault conditions. (See
section on STATUS output.) Status pin voltage is low during shutdown mode
Note: 5. Type refers to whether or not pin is an Input, Output, Input/Output or power supply pin.
ZXLD1371Q
Document number: DS37116 Rev. 3 - 2
2 of 42
www.diodes.com
February 2017
© Diodes Incorporated









No Preview Available !

ZXLD1371Q Даташит, Описание, Даташиты
ZZXXLLDD11337711QQ
Pin Descriptions (continued)
Pin Name
SGND
PGND
N/C
N/C
GATE
Pin
6
7
8
9
10
VAUX
11
VIN 12
ISM 13
FLAG
14
PWM
15
GI 16
EP PAD
Type
(Note 5)
P
P
-
O
P
P
I
O
I
I
P
Function
Signal Ground (Connect to 0V)
Power Ground - Connect to 0V and pin 8 to maximize copper area
Not Connected Internally recommend connection to pin 7, (PGND), to maximize PCB copper for
thermal dissipation
Not Connected Internally recommend connection pin 10 (GATE) to permit wide copper trace to
gate of MOSFET
Gate Drive Output to External NMOS Transistor Connect to Pin 9
Auxiliary Positive Supply to Internal Switch Gate Driver
At VIN < 8V; a bootstrap circuit (where applicable) is recommended to ensure adequate gate
drive voltage
(see Applications section)
At VIN > 8V; connect to VIN
At VIN >24V; to reduce power dissipation, VAUX can be connected to an 8V to 15V auxiliary power
supply (see Applications section). Decouple to ground with capacitor close to device (see
Applications section)
Input Supply to Device 5V to 60V
Decouple to ground with capacitor close to device (refer to Applications section)
Current Monitor Input
Connect current sense resistor between this pin and VIN
The nominal voltage, VSENSE, across the resistor is 218mV fixed in Buck mode and initially 225mV
in Boost and Buck-Boost modes, varying with duty cycle.
Flag Open Drain Output
Pin is high impedance during normal operation
Pin switches low to indicate a fault, or warning condition
Digital PWM Output Current Control
Pin driven either by open Drain or push-pull 3.3V or 5V logic levels.
Drive with frequency higher than 100Hz to gate output ‘on’ and ‘off’ during dimming control.
The device enters standby mode when PWM pin is driven with logic low level for more than 15ms
nominal (Refer to application section for more details)
Gain Setting Input
Used to set the device in Buck mode or Boost, Buck-boost modes and to control the sense voltage
in Boost and Buck-boost modes
Connect to ADJ pin for Buck mode operation
For Boost and Buck-boost modes, connect to resistive divider from ADJ to SGND. The GI divider is
required to compensate for duty cycle gating in the internal feedback loop (see Application section).
The GI pin has an internal clamp that limits the internal node to less than 3V. This provides some
failsafe should it become overdriven.
Exposed Paddle
Connect to 0V plane for electrical and thermal management
Note: 5. Type refers to whether or not pin is an Input, Output, Input/Output or power supply pin.
Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated) (Note 6)
Symbol
Parameter
Rating
Unit
VIN
VAUX
VISM
VSENSE
VGATE
IGATE
VFLAG
VPWM, VADJ, VTADJ, VGI, VPWM
TJ
TST
Input Supply Voltage
Auxiliary Supply Voltage
Current Monitor Input Relative to GND
Current Monitor Sense Voltage (VIN-VISM)
Gate Driver Output Voltage
Gate Driver Continuous Output Current
Flag Output Voltage
Other Input Pins
Maximum Junction Temperature
Storage Temperature
-0.3 to 65
-0.3 to 65
-0.3 to 65
-0.3 to 5
-0.3 to 20
18
-0.3 to 40
-0.3 to 5.5
+150
-55 to +150
V
V
V
V
V
mA
V
V
°C
°C
Note: 6. For correct operation, SGND and PGND should always be connected together.
Caution:
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied.
Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
ZXLD1371Q
Document number: DS37116 Rev. 3 - 2
3 of 42
www.diodes.com
February 2017
© Diodes Incorporated










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