AL8807MP-13 Diodes Inc., AL8807MP-13 Datasheet - Page 16

• Manufacturer Part Number: AL8807MP-13
• Description: LED Lighting Drivers 36V High EFF Low EMI 1A Buck LED Driver
• Manufacturer: Diodes Inc.

Specifications of AL8807MP-13

• Product Category: LED Lighting Drivers
• Rohs: yes
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: MSOP-8EP

AL8807
HIGH EFFICIENCY LOW EMI 36V 1A BUCK LED DRIVER
Applications Information
(cont.)
The associated EMI measurements for this board using the AL8807 is shown in figure 40.
Fig 40. AL8807EV2 Radiated EMI Performance
The EMI performance was measured at 12V
driving two white LEDs (V
= 3.1V at 660mA) on the AL8807EV2. The red bold
DC
F
line is for EN55022 class B used for domestic equipment including lighting. The bottom magenta line is the noise floor of the
test chamber. The middle purple line is the EMI emitted radiation of the AL8807 over 30MHz to 1000MHz. This shows that the
AL8807 passes the standard with at least 16dB margin.
MR16 lamps typically operate from 12V
or 12V
, using conventional electromagnetic transformers or electronic
DC
AC
transformers.
In enclosed lamps such MR16 the ability for the device to operate at high ambient temperatures is critical and figure 41 shows
the surface temperature of the AL8807 on AL8807EV2 in operation under the same conditions as the EMI tests at an free air
temperature of 25ºC. It is anticipated that the internal junction temperature is approximately 6 ºC hotter than the surface
temperature.
Fig 41. Thermal picture of AL8807EV2 at 12V
2 white LEDS at 660mA
DC
The thermal image shows that components increasing the board temperature are the inductor, Schottky diodes and the
AL8807.
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AL8807
June 2012
www.diodes.com
© Diodes Incorporated
Document number: DS35281 Rev. 4 - 2