Datasheet > BD18398EUV-M (开发中)

BD18398EUV-M (开发中)

更新时间： 2024-11-05 11:08:19

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
87页	5027K
描述
The BD18398EUV-M is 3ch synchronous buck DC/DC LED driver with using on-time topology supporting near fixed switching frequency and fast switching duty regulation and with using average LED current feed buck topology for more accreted LED current regulation system over wide input, LED output range.

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Datasheet

Buck LED Driver

2 ch/3 ch Current LED Driver with

SPI for Automotive

BD18397RUV-M BD18398RUV-M BD18397EUV-M BD18398EUV-M

General Description

Key Specifications

The BD18397/98xxx-M are 2 ch/3 ch synchronous buck

DC/DC LED drivers with using on-time topology

supporting near fixed switching frequency and fast

switching duty regulation and with using average LED

current feed buck topology for more accreted LED current

regulation system over wide input, LED output range.

The BD18397/98xxx-M can support individual 10-bit

analog dimming and 10-bit PWM dimming for LED current

by programing the 10-bit register via SPI.

The BD18397/98xxx-M will support LIMP-HOME mode, if

SPI communication has an error. In the LIMP-HOME

mode, individual LED current can be set by the external

pins and can keep LED current sourcing during applying

input power without SPI communication.

◼ Continuous Input Voltage Range

VIN:

PIN:

5VEXT:

5 V to 45 V

5 V to 65 V

4.5 V to 5.5 V

2.5 V to 60 V

2.0 A

±3 %

5 % to 100 %

◼ LED Output Voltage Range:

◼ Maximum Output LED Current/Channel:

◼ LED Average Current Accuracy:

◼ 10-bit Analog Dimming Range:

◼ Programmable Switching Frequency Range:

200 kHz to 2.25 MHz

◼ Junction Temperature Range: -40 °C to +150 °C

Applications

◼ Automotive Exterior Lamps

Rear, Turn, DRL/Position, Fog, High/Low Beam etc.

Features

◼ AEC-Q100 Qualified^{(Note 1)}

Packages

W (Typ) x D (Typ) x H (Max)

12.5 mm x 8.1 mm x 1.0 mm

◼ ISO 26262 Process Compliant to Support ASIL-B

◼ On-time Topology for Near Fixed Frequency Switching

◼ Average LED Current Regulation

◼ Protection Diodes Less for Current Sense Pins

◼ Cycle-by-cycle Switch Over Current Protection

◼ Thermal Shutdown (TSD)

HTSSOP-C48R

HTSSOP-C48

◼ Thermal Sensor Reading

◼ Serial Peripheral Interface (SPI)

◼ LIMP-HOME Mode

(Note 1) Grade1.

Typical Application Circuit

CPINx

VPIN

Boost

DC/DC

PGND

VIN

CVIN

GND

RISN1

GND

SNSN1

RISP1

C5VEXT

C5VREG

SNSP1

RBT1

COUT1

Optional

External

5 V

CBT1

5VREG

5VEXT

BOOT1

SW1

・・・

RSNS1

RSNS2

RSNS3

LED1+

RTON

ROUT1

GND

TON

COMP1

RISN2

CCOMP1 RCOMP1

CCOMP2 RCOMP2

CCOMP3 RCOMP3

SNSN2

RISP2

COMP2

COMP3

SNSP2

RBT2

COUT2

CBT2

BOOT2

V5VREG

SW2

RIS12

RIS22

LED2+

ROUT2

GND

RIS11

ISET/PWM1

ISET/PWM2

ISET/PWM3

RIS21

RSO

RISN3

RIS31

RIS32

SNSN3

RISP3

SNSP3

RBT3

5 V

COUT3

CBT3

BOOT3

SW3

SO/FAULT_B

LED3+

ROUT3

CSB

SCK

MCU

EXP_PAD

Figure 1. Typical Application Circuit

〇Product structure : Silicon integrated circuit 〇This product has no designed protection against radioactive rays.

www.rohm.com

TSZ22111 • 14 • 001

TSZ02201-0T1T0B400410-1-2

01.Mar.2023 Rev.002

1/84

12 3 4 5 6 7...87

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