MP1521EQ MPS [Monolithic Power Systems], MP1521EQ Datasheet

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MP1521EQ

Manufacturer Part Number
MP1521EQ
Description
MP1521 High Efficiency White LED Driver
Manufacturer
MPS [Monolithic Power Systems]
Datasheet
1.MP1521EQ.pdf (4 pages)
General Description
The EV0021 evaluation board uses the
MP1521 to drive up to three strings of 5 White
LEDs.
constant minimum off-time architecture and
has
feedbacks. The OLS pin is designed for
detecting loose or open LED connections.
The feedback pins measure voltage across
sense resistors in series with the LED strings.
When supplying a bias current of 20mA, the
voltage drop across the sense resistor is only
0.4V to minimize power loss. Either a DC
voltage or a PWM signal at the BRT/PWM
input can control the LED brightness.
MP1521 has an on board power MOSFET
switch that is protected by current limit, open
load shutdown, thermal shutdown, and under
voltage lockout.
Ordering Information
Figure 1: EV0021 Evaluation Board
EV0021 Rev 1.1_01/21/03
Monolithic Power Systems
Board Number
EV0021
three
This MP1521 uses a peak current,
individual
MPS IC Number
MP1521EQ
current-sensing
www.monolithicpower.com
The
Absolute Maximum Ratings
Supply Voltage (V
Switch Voltage to GND
V
Storage Temperature
Recommended Operating Conditions
Supply Voltage (V
EN
,V
REF
, V
BRT
MP1521 High Efficiency
, V
FB1
IN
IN
)
, V
)
White LED Driver
FB2
EVALUATION BOARD
, V
FB3
-55°C to +150°C
EV0021
-0.5V to 28V
2.7 V to 25V
–0.3V to 6V
28V
1

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MP1521EQ Summary of contents

Page 1

... MP1521 has an on board power MOSFET switch that is protected by current limit, open load shutdown, thermal shutdown, and under voltage lockout. Ordering Information Board Number MPS IC Number EV0021 MP1521EQ Figure 1: EV0021 Evaluation Board EV0021 Rev 1.1_01/21/03 Absolute Maximum Ratings Supply Voltage (V Switch Voltage to GND V ,V ...

Page 2

Monolithic Power Systems Figure 2: EV0021 Schematic EV0021 Rev 1.1_01/21/03 MP1521 High Efficiency www.monolithicpower.com EV0021 White LED Driver EVALUATION BOARD 2 ...

Page 3

... Monolithic Power Systems Table 1: EV0021 Bill of Materials Parts ICs MP1521EQ Capacitors 4.7µF 1µF, 25V Resistors 10KΩ 20Ω Inductors 15µH Diodes B130, 1A, 30V, Schottky LEDS (Not Provided) Operating Instructions 1. Connect VCC to the power source’s positive output. 2. Connect GND to supply ground. ...

Page 4

Monolithic Power Systems Figure 3: EV0021 Top Silk Layer Figure 4: EV0021 Top Layer Figure 5: EV0021 Bottom Layer NOTICE: MPS believes the information in this document to be accurate and reliable. However subject to change without notice. ...

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