A9910 AITSEMI | Alldatasheet
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AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 1 - DESCRIPTION FEATURES The A9910 is a PWM high -efficiency LED driver control IC. It allows efficient operation of high-brightness (HB) LEDs from voltage sources ranging from 10VDC up to 600VDC. The A9910 controls an external MOSFET at fixed switching frequencies up to 300 kHz. The frequency can be programmed using a single resistor. The LED string is driven at a constant current rather than a constant voltage, thus providing a constant light output and an enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A. The A9910 uses a rugged high-voltage junction isolated process that can withstand an input voltage surge up to 600V. The output current to a LED string can be programmed to any value between zero and i ts maximum value by applying an external control voltage at the linear dimming control input of the A9910. The A9910 provides a low -frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz. The A9910 is available in SOP8 package.
ORDERING INFORMATION
SPQ: 2,500pcs/Reel A9910M8R A9910M8VR Note R: Tape & Reel V: Halogen free Package AiT provides all RoHS products ⚫ >90% efficiency ⚫ 10V to 600V input range ⚫ Constant-current LED driver ⚫ Applications from a few mA to more than 1A output ⚫ LED string from one to hundreds of diodes ⚫ Linear and PWM dimming capability ⚫ Input voltage surge ratings up to 600V ⚫ Available in SOP8 Package APPLICATION ⚫ DC/DC or AC/DC LED driver applications ⚫ RGB backlighting LED driver ⚫ Backlighting of flat panel displays ⚫ General-purpose constant current source ⚫ Signage and decorative LED lighting ⚫ Automotive ⚫ Chargers TYPICAL APPLICATION
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function
1 VIN Power Supply
2 CS Senses LED string current.
3 GND Ground
4 GATE Drives the gate of the external MOSFET
5 PWM_D Low Frequency PWM Dimming pin
6 VDD Internally regulated supply voltage
Linear Dimming by changing the current limit threshold at current sense comparator-
8 ROSC Oscillator control
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 3 - ABSOLUTE MAXIMUM RATINGS VIN to GND -0.5V ~ +600V CS, LD, PWM_D, GATE to GND -0.3V ~ VDD+0.3V Continuous power dissipation (TA = +25°C)NOTE1 SOP8(derate 6.3mW/°C above +25°C) 630mW Operating Temperature Range -40°C ~ +85°C Junction Temperature +125°C Storage Temperature Range -65°C ~ +150°C Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. NOTE1: Also limited by package power dissipation limit, whichever is lower.
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 4 -
ELECTRICAL CHARACTERISTICS
TA = +25°C, unless noted otherwise Parameter Symbol Conditions Min. Typ. Max. Unit Input DC supply voltage range VINDCNOTE1 DC input voltage 10.0 - 600 V Shut-down mode supply current IINSD Pin PWM_D to GND, VIN=8V 0.5 - 1 mA Internally regulated voltage VDD VIN = 10 to 600V, IDD(ext)=0, pin Gate open 7.0 7.5 8.0 V Load regulation of VDD ΔVDD, load IDD(ext) = 0 to 1.0mA, 500pF at GATE; ROSC = 226kΩ, PWM_D= VDD 0 - 100 mV Maximal pin VDD voltage VDD,max When an external voltage is applied to pin VDD - - 10.0 V VDD current available for external circuitry IDD(ext) VIN = 10 to 100V - - 0.7 mA VDD undervoltage lockout threshold UVLO VIN rising 6.45 6.7 6.95 V VDD undervoltage lockout hysteresis ΔUVLO VIN falling - 500 - mV Pin PWM_D input low voltage VEN(lo) VIN = 10 to 600V - - 0.8 V Pin PWM_D input high voltage VEN(hi) VIN = 10 to 600V 2.0 - - V Pin PWM_D pull-down resistance REN VEN = 5V 50 100 150 kΩ Current sense pull-in threshold voltage VCS(hi) TA = -40 C to +85 C 225 250 275 mV GATE high output voltage VGATE(hi) IOUT = 10mA VDD- 0.3 - VDD V GATE low output voltage VGATE(lo) IOUT = -10mA 0 - 0.3 V Oscillator frequency fOSC ROSC = 1.00MΩ ROSC = 226kΩ 100 120 kHz
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 5 - Parameter Symbol Conditions Min. Typ. Max. Unit Maximum Oscillator PWM Duty Cycle DMAX hf FPWM hf = 25kHz, at GATE, CS to GND - - 100% Pin LD (Linear Dimming) voltage range VLD TA = <85°C, VIN = 12V 0 - 250 mV Current sense blanking interval TBLANK VCS = 0.55VLD, VLD = VDD 150 215 280 ns Delay from CS to GATE lo tDELAY VIN = 12V, VLD = 0.15, VCS = 0 to 0.22V after TBLANK - - 300 ns GATE output rise time tRISE CGATE = 500pF, VDD = 7.5V 30 - 50 ns GATE output fall time tFALL CGATE = 500pF, VDD = 7.5V 30 - 50 ns NOTE1: Also limited by package power dissipation limit, whichever is lower.
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 6 - BLOCK DIAGRAM
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 7 -
PACKAGE INFORMATION
Dimension in SOP8 (Unit: mm) Symbol Min Max A 1.350 1.750 A1 0.100 0.250 A2 1.350 1.550 b 0.330 0.510 c 0.170 0.250 D 4.700 5.100 E 3.800 4.000 E1 5.800 6.200 e 1.270 BSC L 0.400 1.270 θ 0° 8°
AiT Semiconductor Inc. www.ait-ic.com A9910 AC-DC LED DRIVER UNIVERSAL HIGH BRIGHTNESS LED DRIVER REV1.0 - MAR 2013 RELEASED - - 8 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its produc t, specifications, to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere property, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc . assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.