ZLED7020 Datasheet, PDF (1/27 Pages) List of Unclassifed Manufacturers – High Current 40V LED Driver with Internal Switch

High Current 40V LED
Driver with Internal Switch
ZLED7x20
Datasheet
Brief Description
Benefits
The ZLED7x20 continuous-mode inductive step-
down converter family is part of our line of LED-
control ICs. It is designed for applications requiring
high brightness and high current. It can efficiently
drive a single LED or multiple series-connected
LEDs from a voltage input higher than the LED for-
ward voltage: Vin = 6 to 40 VDC. It provides an
adjustable output current ≤1.2A, which is set via an
external resistor and controlled by the ZLED7x20’s
integrated high-side output current-sensing circuit
and high speed internal 40V power switch. An
external control signal, which can be a DC voltage,
PWM, or microcontroller-generated waveform, on
the ADJ pin can also be used to linearly adjust a
continuous output current or to control a gated out-
put current.
• High efficiency: up to 98%
• Single pin on/off and brightness control using
DC voltage or PWM
• Very few external components needed for
operation
• Footprint compatible with our ZLED7000
depending on the application.
Available Support
• Evaluation Kit
Physical Characteristics
• Operating junction temperature: -40°C to 125°C
• Switching frequency: up to 1MHz
The output can be turned off by applying a voltage
lower than 0.2V to the ADJ pin, which puts the
ZLED7x20 in a low-current standby state.
The ZLED7x20 enables diverse industrial and
consumer lighting applications requiring high
driving currents, wide operating voltage range,
high efficiency, and variable brightness control. It
offers over-temperature and LED open-circuit pro-
tection. The ZLED7x20 can also minimize bill-of-
material costs because very few external com-
ponents are required for most applications. Only a
resistor, a diode, an inductor, and three capacitors
are needed for a typical basic application.
Features
ZLED7x20 Family Selection Matrix
Product
Max. Current Output Package
ZLED7020
1.2A
SOT89-5
ZLED7320
1.0A
DFN-5
ZLED7520
0.75A
DFN-5
ZLED7720
0.35A
DFN-5
ZLED7x20 Typical Application Circuit
• Up to 1.2A output current
Vs = 6 to 40 VDC
Rs
• Internal 40V power switch
D1
• Wide DC input voltage range 6 to 40 VDC
• Output current accuracy: 3% (typical)
• Dimming ratio: 1200:1
• LED open-circuit protection
Vin
I _SENSE
(C3)
• Thermal shutdown protection
(C1) C2
0.1µF
ZLED7x20
LX
ADJ
GND
L1
33µH to
220µH
LED
String
© 2016 Integrated Device Technology, Inc.
1
April 20, 2016