ma-400-62 Agamem Microelectronic Inc., ma-400-62 Datasheet - Page 5

• Manufacturer Part Number: ma-400-62
• Description: High Power Led Driver
• Manufacturer: Agamem Microelectronic Inc.

PRELIMINARY
(3) LED Current Setting
In the LEDs application, the AA1704 is generally programmed as a current source. The
bias resistor R
current of the LED using the equation:
Where Vref is the reference voltage (1.22V), I
order to achieve accurate LED current, 1% precision resistors are recommended.
(4) Thermal Protection
When the junction temperature exceeds 150 , the output will be turned off. When the
temperature is below 130 , the output will be turned on again.
!
!
!
©Copyright Agamem Microelectronics Inc.
AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER
NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT
ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED
HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
• The specifications for the product described in this document are for reference only.
• The application circuit examples explain typical applications of the products, and do not
• Application circuit diagrams and circuit constants contained herein are shown as
• Take account of common impedance when designing the earth line on a printed wiring
!NOTES ON USE
!ORDERING INFORMATION
Upon actual use, therefore, please request that specifications to be separately
delivered.
guarantee the success of any specific mass-production design.
examples of standard use and operation. Please pay careful attention to the peripheral
conditions when designing circuits and deciding upon circuit constants in the set.
board.
ORDER NO.
AA1704S
I
LED
SET
=
, as shown in the typical application circuit is used to set the operating
R
Vref
Agamem Microelectronics Inc.
SET
PACKAGE
SOP 8L
* 240
Tape & Reel
PACKING
5
LED
is the operating current of the LEDs. In
HIGH POWER LED DRIVER
3,000ea
Q’TY
www.agamem.com.tw
AA1704
MARK CHART
AA1704
XXXX
S
2009/8/2