OZ9966 데이터 시트보기 (PDF) - Unspecified

부품명

상세내역

제조사

OZ9966

OZ9966 Intelligent Lighting

Unspecified 

OZ9955A

FEATURES

• 50V internal MOSFET high frequency DC/DC converter controller

• Drives up to 8 strings in parallel

• Integrated LED current balance control circuit

• Integrated power MOSFET

• Up to 2.0MHz user-defined switching frequency

• Supports internal or external PWM dimming

• Over-voltage, over-current, output short circuit, and thermal protection

• LED fault status output

• Soft start function

GENERAL DESCRIPTION

OZ9955A is a high efficiency, DC/DC controllers that drive up to eight (8) strings of LEDs

in parallel configuration, with multiple LEDs in each string connected in series. It provides

eight (8) LED current sense inputs in an “OR” configuration to improve backlight reliability.

This allows the backlight to remain functioning in the event that any string (s) is damaged

during normal operation.

OZ9955A can receive either a DC signal for internal Low frequency Pulse Width Modula-

tion (LPWM) or an external PWM signal.

This IC provides integrated circuits to balance the current flow through each LED string,

as well as, integrated power MOSFETs.

APPLICATIONS

• Notebook/Netbook Computer

APPLICATION DIAGRAM

FEATURES

OZ9955B

• High frequency DC/DC power converter controller

• Drives up to 8 strings in parallel

• Supports SMBus, DPST and SMBus + DPST brightness control modes

• Supports SMBus protocol dimming control

• 256 step dimming control

• Integrated LED current balance control circuit

• Integrated power MOSFET

• Over-current, over-voltage, and thermal protection

• Soft start function

GENERAL DESCRIPTION

OZ9955B is a LED controller with SMBus interface that drives up to eight (8) strings

of LEDs in parallel configuration, with multiple LEDs in each string connected in se-

ries. It is targeted for notebook/netbook applications using SMBus dimming control.

It provides eight (8) LED current sense inputs in an “OR” configuration for improved

backlight reliability. This allows the backlight to remain functioning in the event that

any string (s) is damaged during normal operation.

This IC provides an integrated circuit to balance the current flow through each LED

string, as well as, the integrated power MOSFET.

APPLICATIONS

• Notebook/Netbook Computer

APPLICATION DIAGRAM

U.S. Patent #7,498,793; 7,847,783; and more patents pending.

16

U.S. Patent #7,498,793; 7,847,783; and more patents pending.

17

Share Link: