Datasheet > A80605KESJSR-1

A80605KESJSR-1

更新时间： 2024-11-06 02:51:23

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
42页	4624K
描述
High Power LED Driver with Pre-Emptive Boost for Ultra-High Dimming Ratio and Low Output Ripple

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A80605KESJSR-1 数据手册

A80605 and A80605-1

High Power LED Driver with Pre-Emptive Boost

for Ultra-High Dimming Ratio and Low Output Ripple

FEATURES AND BENEFITS

DESCRIPTION

The A80605 is a multi-output LED driver for automotive

applicationssuchasexteriorlighting,heads-updisplay,andmid-

size LCD backlighting. It implements a current-mode boost/

SEPICconverterwithgatedriverforexternalN-MOSFET.This

allows greater output power even at minimum supply voltage.

• Automotive AEC-Q100 qualified

• Enhanced fault handling for ASIL B system compliance

• Wide input voltage range of 4.5 to 40 V for start/stop,

cold crank, and load dump requirements

• Operate in Boost or SEPIC mode for flexible output

• Gate driver for external NMOS to deliver higher output power

• Six integrated LED current sinks, up to 140 mA each

• Boost switching frequency synced externally or

programmed from 200 kHz to 2.3 MHz

• Programmable boost frequency dithering to reduce EMI

• Advanced control allows minimum PWM on-time down

to 0.3 µs, and avoids MLCC audible noises

• LED contrast ratio: 15,000:1 at 200 Hz using PWM

dimming alone, 150,000:1 when combining PWM and

analog dimming

TheA80605 provides six integrated current sinks driving up to

140 mAper string. Multiple sinks can be paralleled together to

achieve higher LED currents up to 840 mA. The IC operates

from single power supply from 4.5 to 40 V; once started, it can

continue to operate down to 4 V. This allows it to withstand

stop/start, cold crank, and load dump conditions encountered

in automotive systems.

TheA80605cancontrolLEDbrightnessthroughexternalPWM

signal.ByusingthepatentedPre-EmptiveBoostcontrol,anLED

brightnesscontrastratioof15,000:1canbeachievedusingPWM

dimmingat200Hz.Ahigherratioof150,000:1ispossiblewhen

using a combination of PWM and analog dimming.

• Excellent input voltage transient response even at lowest

PWM duty cycle

• Gate driver for optional PMOS input disconnect switch

• Extensive fault protection features

Continued on next page...

PACKAGE:

APPLICATIONS

• Automotive infotainment backlighting

24-Pin 4 mm × 4 mm QFN

with Wettable Flank

• Automotive heads-up display

• Automotive interior and exterior lighting

Not to scale

V_IN= 8-16 V

ꢀoptional

V_OUT≤ 40 V

R_SENSE

R_ADJ

C_IN2

C_in

R_OVP

R_CS

C_DRV

R_GDRV

C_OUT

GATE

VDRV GDRV

PGND

OVP

Vsense

VIN

C_VDD

VDD

R_PU

LED1

FAULT

A80605

Up to 11 WLEDs in series

Up to 140 mA/channel

Combine to drive up to 840 mA total

LED2

LED3

EN/PWM

ADIM

PWM t_ON≥ 0.3 µs

LED6

i_LED

COMP

PEB

100%

FSET

AGND

ISET

DITH

R_Z

ADIM

C_P

R_M

PEB = Pre-Emptive Boost

(R_Dcontrols the delay time)

DITH = Dithering Control

R_ISET

R_FSET

R_D

C_M

C_Z

APWM 100 kHz 0-90%

(Modulation frequency and range)

Figure 1: A80605 in typical Boost conﬁguration where V_OUTis higher than V_IN

A80605-DS, Rev. 2

MCO-0000765

June 15, 2020

12 3 4 5 6 7...42

中文翻译

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与A80605KESJSR-1相关器件

型号	品牌	获取价格	描述	数据表
A80606	ALLEGRO	获取价格	High Power LED Driver with Pre-Emptive Boost
A80606KEVJSR	ALLEGRO	获取价格	High Power LED Driver with Pre-Emptive Boost
A80606KEVJSR-1	ALLEGRO	获取价格	High Power LED Driver with Pre-Emptive Boost
A8067469	ETC	获取价格	P O T T I N G B O X E S
A806ERW	MPD	获取价格	Low Cost, 8W DIP Wide Input Range DC/DC Converters
A807	ETC	获取价格	Surface Mount Back Boxes
A8070200	ETC	获取价格	P O T T I N G B O X E S
A8070350	ETC	获取价格	P O T T I N G B O X E S
A807ERW	MPD	获取价格	Low Cost, 8W DIP Wide Input Range DC/DC Converters
A80860-33	INTEL	获取价格	RISC Microprocessor, 64-Bit, 33.3MHz, CMOS, CPGA168

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