MP3304 MPS, MP3304 Datasheet - Page 4

• Manufacturer Part Number: MP3304
• Description: The Future Of Analog Ic Technology
• Manufacturer: MPS

PIN FUNCTIONS
MP3304 Rev. 0.91
4/19/2010
Pin #
1
2
3
4
5
6
7
8
Exposed Pad
MP3304 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING
PGND
Name
GND,
ISET
LED
N/C
SW
EN
IN
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
Pin Function
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the
power inductor and output rectifier to SW. SW can swing between GND and 36V
(MP3304A), 24V (MP3304B) or 18V (MP3304C).
Power Ground.
Input Supply Pin. Must be locally bypassed.
No Connect.
ON/OFF Control and Dimming Command Input. Holding EN pin low for more than
5ms will turn the part off. To use PWM dimming, add a 250Hz to 50KHz square
wave signal to this pin.
LED Current Input. This pin is the open-drain output of an internal dimming control
switch. Connect the LED cathode to this pin.
LED Current Set. This pin is the source output of an internal dimming control switch.
The MP3304 regulates the voltage across the current setting resistor. Tie a current
setting resistor from this pin to ground. The regulation voltage is 200mV.
Ground. Connect Exposed Pad to GND plane for optimal thermal performance.
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