ZLED7015 Datasheet, PDF (1/22 Pages) List of Unclassifed Manufacturers – 1.0MHz Boost Converter with Internal 35V Switch

1.0MHz Boost Converter
with Internal 35V Switch
ZLED7015
Datasheet
Brief Description
The ZLED7015, one of our ZLED family of LED
control ICs, is a constant current boost converter
with an internal high-power 35V switch. It is opti-
mal for driving multiple white LEDs connected in
series so that the LED current is uniform for better
brightness and color control. It can also drive
devices that require a constant voltage and is
capable of operating efficiently with voltage
supplies ranging from 6VDC to 30VDC. It is ideal
for diverse lighting applications requiring low sup-
ply voltages such as SELV applications. Typically,
smaller, less expensive external components can
be used since the ZLED7015 switches at 1.0MHz
(typical).
The ZLED7015 output current is adjustable via an
external current sense resistor R_S connected from
the FB pin to ground.
The ZLED7015 improves efficiency and minimizes
power losses in the current setting resistor R_S by
use of an internal 0.3V feedback reference vol-
tage.
Dimming can be controlled using a pulse-width
modulation (PWM) waveform or a DC voltage
applied to the FB pin.
The ZLED7015 provides a “soft-start” function to
prevent excessive in-rush current on start-up and
ensures a controlled rise of the output voltage.
Over-voltage protection is adjustable via external
resistors R₁ and R₂.
Features
• Integrated 35V power switch
• Wide input range: 6VDC to 30VDC
• Over-temperature protection
• Over-voltage (open LED string) protection adjusted
via external resistor divider
• Under-voltage lockout ensures reliable circuit
operation
• Control of output current during start-up via internal
“soft-start”
• Switching frequency: 1.0MHz
• Single pin on/off or brightness control via PWM,
microcontroller, or DC voltage control signal input
• MSOP-10 package
Benefits
• High efficiency: up to 95% efficiency
• Few small, low-profile components needed for
operation
• Small form-factor package
Available Support
• Evaluation Kit
Physical Characteristics
• Operating temperature: -40°C to 85°C
• RoHS-compliant
ZLED7015 Typical Application Circuit
V_IN = 6 to 30 VDC
C_IN
C₁
L₁
R_EN
R_VDD
EN
VDD
LX
OVP
C_VDD
ZLED7015 ^FB
VP
PGND AGND
D₁
R₁
R₂
C_VP
V_OUT
C₂
LED
String
C_OVP
C_OUT
R_S
© 2016 Integrated Device Technology, Inc.
1
April 20, 2016