Datasheet

S P E C I F I C A T I O N

PAGE :

DOCUMENT No :

REG. DATE : 10. 12. 16

MODEL : LEMWH51X75HZ00

REV. DATE : . .

REV.NO : 0.0

(30)-4022

LGIT Confidential and Proprietary

PRELIMINARY

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9-5. Reverse voltage in Zener Diode embed LED

- If reverse voltage is applied to the LEDs,

it will damage the Zener diode and LEDs

and result in destruction.

9-6. Static Electricity

- If over-voltage, which exceeds the absolute maximum rating, is applied to the

LEDs, it will damage the LEDs and result in destruction. Since the LEDs are

sensitive to the static electricity and surge, it is strongly recommended to use a

wristband or anti-electrostatic glove when handling the LEDs and all devices,

equipment and machinery must be properly grounded.

- Damaged LEDs will show some unusual characteristics such as the leak current

remarkably increases, the turn-on voltage becomes lower, or the LEDs do not

light at the low current.

- When examining the final product, it is recommended to check whether

the assembled LEDs are damaged by static electricity or not. Static-damaged

LEDs can easily be found by light-on test or the VF test at a low current.

9-7. Application limits of LED Driver IC controller

- GaN based LED is relatively weak to electrical damage(such as static electricity

and over current stress). Forward leakage of LED occurred by such damage

in the forward low current region may result in turn-on-delay of LCD back light,

which is dependent on a specific function of driver IC.

For reasons mentioned above, minimum current level(source start-up current) of

LED driver IC must be more than 0.3 mA. LGIT cannot make a guarantee on the

LED using in Driver IC with start up current level of < 0.3 mA.

- When parallel circuit LED driver IC is applied in BLU, hot spot may occur in low

current LCD operation region(dimming mode) by difference of LED voltage in low

current region. So, driver IC with Individual LED controller is recommended.

-3-2-101234

-60

-40

-20

Current(mA)

Applied Voltage(V)

Zener Diode + LED