ZLED7x30
High Current 40V LED Driver
with Switch Dimming
Datasheet
Brief Description
Features
• Switch dimming with multiple levels
The ZLED7x30 continuous-mode inductive step-
down converter family is one of our ZLED LED-
control ICs. It is designed for applications requiring
high brightness and high current. The ZLED7x30
can efficiently drive a single LED or multiple
series-connected LEDs from a voltage input higher
than the LED forward voltage (Vin = 8.5 to
40VDC). It provides an adjustable output current
(1.2A maximum), which is set via an external
resistor and controlled by the ZLED7x30’s
integrated high-side output current-sensing circuit
and high speed internal 40V power switch. Its low
conducting impedance ensures high system effi-
ciency.
• Three modes for output level settings
• Up to 1.2A output current
• Internal 40V power switch
• Wide DC input voltage range 8.5 to 40 VDC
• Output current accuracy: 5% (typical)
• LED open-circuit protection
• Thermal shutdown protection
Benefits
• High efficiency: up to 98%
• Very few external components needed for
operation
The ZLED7x30 provides a switch dimming func-
tion. It detects external switch action to adjust out-
put current, allowing dimming functionality to be
achieved without changing the original lighting sys-
tem circuitry.
• Adds switch dimming function to existing
installation
Available Support
• Evaluation Kit
The switch dimming is implemented in either two-
level mode or three-level mode. The output current
of every level and the total number of levels are
customer selected by setting the corresponding
input conditions of DIM1 and DIM2 pin.
Physical Characteristics
• Operating temperature: -40°C to 105°C
• Switching frequency: up to 1MHz
• SOP-8 package
The ZLED7x30 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
protection. The ZLED7x30 can also minimize bill-
of-material costs because very few external
components are required for most applications.
Only a resistor, a diode, an inductor, and three
ZLED7x30 Family Selection Matrix
Product
ZLED7030
ZLED7330
ZLED7530
ZLED7730
Max. Current Output
Package
SOP-8
SOP-8
SOP-8
SOP-8
1.2A
1.0A
0.75A
0.35A
capacitors are needed for
application.
a
typical basic
ZLED7x30 Typical Application Circuit
Rs
Switch
D1
Vs = 8.5 to 40 VDC
(C3)
LED
String
Vin
I SENSE
L1
33 to 220 µH
ZLED7x30
C1
≥220µF
C2
0.1µF
LX
DIM1
DIM2
GND/Floating
GND/Floating
GND
© 2016 Integrated Device Technology, Inc.
1
April 20, 2016