LP5526TLEV National Semiconductor, LP5526TLEV Datasheet - Page 5

• Manufacturer Part Number: LP5526TLEV
• Description: BOARD EVAL LP5526 LMU LED DRIVER
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP5526TLEV

• Current - Output / Channel: 150mA
• Outputs And Type: 2 (25mA), 1 (150mA)
• Voltage - Output: 20 V
• Features: Camera Flash, Dimmable, RGB Controller
• Voltage - Input: 3 ~ 5.5V
• Utilized Ic / Part: LP5526
• Lead Free Status / RoHS Status: Not applicable / Not applicable

Evaluation Hardware
The evaluation board has the LP5526 circuit with the neces-
sary external components placed around it. Test points for the
circuit pins are on the board edges. PCB connectors make
the connection to the USB interface board or some other con-
troller if needed.
The supply voltage V
V
the USB interface is used, the V
power or supplied from the USB board, but the V
is recommended coming from the USB board (Jumper J21
set to USB). When USB power for V
J1 jumper in USB board to 5V to ensure sufficient input power
from USB. V
power or USB power (5V). LP5526’s V
DDIO
can be connected in the green power connector. When
BATT
jumper J17 sets V
BATT
, ground GND and I/O-voltage
BATT
BATT
BATT
can be either external
DD
is used, set also the
voltage can be set
between external
Figure 8. LP5526 Evaluation Board
DDIO
supply
5
with J19 jumper to be same as V
or 5V from USB) or regulated 3.3V from USB board. Latter is
recommended.
The RGB output has current limiting resistors, which can be
shorted with jumpers J6 – J8. If you short the resistors, make
sure that you use the RGB drivers in the constant current
mode. The default after power-on-reset is switch mode. When
constant current mode is used, resistors R23 and R27 limits
RGB current; when jumper J26 is disconnected Rrgb is set to
2.4k + 3.3k = 5.7 kΩ, and when J26 is set, R27 is bypassed
and resistance is 2.4 kΩ. By disconnecting J26 jumper it is
possible to use lower RGB currents and therefore USB-power
is not overloaded even if Flash is used.
20198217
BATT
voltage (external power
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