ROHM BH6456GUL Technical data

A

System Lens Driver Series for Mobile Phone Cameras

2-wire serial interface
Lens Driver for Voice Coil Motor
(I2C BUS compatible)

BH6456GUL

●General Description

The BH6456GUL motor driver provide 1 Full on Driver a
H-bridge.
This lens driver is offered in an ultra-small functional lens
system for use in an auto focus system using a Piezo
actuator.

●Features

 Ultra-small chip size package .
 Low ON-Resistance Power CMOS output.
 Built-in 15MHz Oscillator
 Built-in UVLO (Under Voltage Locked Out: UVLO).
 Built-in TSD (Thermal Shut Down) circuit.
 Standby current consumption: 0μA Typ.
 1.8V can be put into each control input terminal

●Applications

 For Auto focus of camera module
 Digital still camera
 Camera Modules
 Lens Auto focus
 Web Cameras

●Typical Application Circuit(s)

SDA

SCL

2-wire

Serial

Interface

TSD

UVLO

PS

Controller

15MHz

OSC

Pre

Driver

Fig.1 Block Diagram

○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

●Key Specifications

 Pch ON Resistance: 0.70Ω(Typ.)
 Nch ON Resistance: 0.70Ω(Typ.)
 Standby current consumption: 0μA (Typ.)
 15MHz OSC: ±3.0%
 Operating temperature range: -25℃ to +85℃

●Package(s) W(Typ.) x D(Typ.) x H(Max.)

VCSP50L1 1.95mm x 1.00mm x 0.55mm

VCC

Band

Gap

VREG

VM

OUTA

H Bridge

OUTB

GND

No.12015EAT03

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© 2012 ROHM Co., Ltd. All rights reserved.

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BH6456GUL

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Technical Note

● Absolute maximum ratings (Ta=+25°C)

Parameter Symbol Limit Unit
Power supply voltage VCC -0.3 to +4.5 V
Motor power supply voltage VM -0.3 to +5.5 V
Power save input voltage VPS

-0.3 to VCC+0.3 V
Control input voltage VIN -0.3 to VCC+0.3 V
Power dissipation Pd 530*1 mW
Operating
temperature range

Topr -25 to +85 °C

Junction temperature Tjmax +125 °C
Storage temperature range Tstg -55 to +125 °C
H-bridge output current Iout -500 to +500*2 mA

*1

Conditions: mounted on a glass epoxy board (50mm  58mm  1.75mm; 8 layers). In case of Ta>25°C, reduced by 5.3 mW/°C.

*2

Must not exceed Pd, ASO, or Tjmax of 125°C.

●Operating Conditions (Ta= -25°C to +85°C)

Parameter Symbol Min. Typ. Max. Unit
Power supply voltage VCC 2.3 3.0 3.6 V
Motor power supply voltage VM 2.3 3.0 4.8 V
Power save input voltage VPS
Control input voltage VIN
2-wire serial interface transmission rate SCL

0 - VCC V
0 - VCC V

- - 400 kHz

H-bridge output current Iout - - 400*3 mA

*3

Must not exceed Pd, ASO.

Package Outline Pin Arrangement (Top View)

1PIN MARK

1 2 3 4

AAU

(φ0.15)
INDEX POST

0.225±0.05

1.0±0.05

1.95±0.05

φ0.25±0.1

P=0.5×3

Lot No.

0.55MAX

0.1±0.05

P=0.5×1

0.25±0.05

Fig.2 VCSP50L1 Package (Unit: mm)

AVM OUTB SCL SDA

Top View

B OUTA GND VCC PS

Fig.3 Pin Arrangement (Top View)

Side View

Bottom View

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© 2012 ROHM Co., Ltd. All rights reserved.

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● Electrical Characteristics (Unless otherwise specified Ta=25°C, VCC=3.0V )

Parameter Symbol

Min. Typ. Max.

Limit

Unit Conditions

Overall
Circuit current

during standby operation

ICCST - 0 1

μA

PS=L

Circuit current ICC - 3.2 6.4 mA PS=H, SCL=400kHz, OSC active
UVLO
UVLO voltage VUVLO 1.8 - 2.2 V
Power save input
High level input voltage VPSH 1.5 - VCC V
Low level input voltage VPSL 0 - 0.5 V
High level input current
Low level input current

IPSH

IPSL

15 30 60 μA VINH=3.0V

-3 0 - μA VINL=0V
Control input(SDA,SCL)
High level input voltage
Low level input voltage
Low level output voltage
High level input current
Low level input current

VINH
VINL

VOL
IINH

IINL

1.5 - VCC V
0 - 0.5 V

- - 0.4 V IIN=3.0mA (SDA)

-10 - 10 μA Input voltage=VCC

-10 - 10 μA Input voltage=GND

H Bridge Drive

Ω

Output ON-Resistance

Cycle length of
sequence drive

RONP - 0.7 1.0
RONN - 0.7 1.0

TMIN 10.35 10.67 11.00 μs*4 Built in CLK 160 count

Output rise time Tr - 0.1 0.8 μs
Output fall time Tf - 0.02 0.4 μs

*4

The time that 1 cycle of sequence drive at the below setting of 2-wire serial data

*5

Output switching wave

ta[7:0] = 0x13, brake1[7:0] = 0x03, tb[7:0] = 0x1E, brake2[7:0] = 0x6B, osc[2:0] = 0x0

Ω

*5

7.5Ω load condition

*5

7.5Ω load condition

Output
voltage

90%

10%

10%

Tf Tr

90%

100

0%

Technical Note

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© 2012 ROHM Co., Ltd. All rights reserved.

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BH6456GUL

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Technical Note

●2 wire Serial Interface Register detail

Write mode :S 0 0 0 1 1 0 0 0 A PST2T1T0W3W2W1W0 A D7D6D5D4D3D2D1D0 A P Master is output

Read mode :S00011000APST2T1T0W3W2W1W0AS00011001AD7D6D5D4D3D2D1D0nA P

S=Start condition A=Acknowledge PS=Power save W3～W0=Resister address
P=Stop condition ｎA=not Acknowledge T2～T0=Test bit D7～D0=Data

↑ ↑

Write Up date Slave is output

↑ ↑

Write Read

●Resister

Address W3 W2 W1 W0 D7 D6 D5 D4 D3 D2 D1 D0

0H 0 0 0 0 HiZE initB[2] initB[1] InitB[0] init START MODE dir

1H 0 0 0 1 ta[7] ta[6] ta[5] ta[4] ta[3] ta[2] ta[1] ta[0]

2H 0 0 1 0 brake1[7] brake1[6] brake1[5] brake1[4] brake1[3] brake1[2] brake1[1] brake1[0]

3H 0 0 1 1 tb[7] tb[6] tb[5] tb[4] tb[3] tb[2] tb[1] tb[0]

4H 0 1 0 0 brake2[7] brake2[6] brake2[5] brake2[4] brake2[3] brake2[2] brake2[1] brake2[0]

5H 0 1 0 1 cnt[7] cnt[6] cnt[5] cnt[4] cnt[3] cnt[2] cnt[1] cnt[0]

6H 0 1 1 0 cnt[15] cnt[14] cnt[13] cnt[12] cnt[11] cnt[10] cnt[9] cnt[8]

7H 0 1 1 1 pa pb osc[2] osc[1] osc[0] cntck[2] cntck[1] cntck[0]

8H 1 0 0 0 TEST TEST TEST TEST TEST TEST TEST TEST

9H 1 0 0 1 TEST TEST TEST TEST TEST TEST TEST TEST

AH 1 0 1 0 TEST TEST TEST TEST TEST TEST EXT initEXT

BH 1 0 1 1 TEST TEST TEST TEST TEST TEST TEST TEST

CH 1 1 0 0 TEST TEST TEST TEST TEST TEST TEST TEST

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© 2012 ROHM Co., Ltd. All rights reserved.

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BH6456GUL

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Technical Note

●2 wire Serial Interface Action Timing Characteristics (Unless otherwise specified, Ta=-25 to +85°C, VCC=2.3 to 4.8V)

Parameter Symbol

FAST-MO DE*6 STANDARD-MODE*6

Min. Typ. Max. Min. Typ. Max.
SCL frequency fSCL - - 400 - - 100 kHz
Data clock high time tHIGH 0.6 - - 4.0 - - μs
Data clock low time tLOW 1.3 - - 4.7 - - μs
Start condition hold time tHD:STA 0.6 - - 4.0 - - μs
Start condition setup time tSU:STA 0.6 - - 4.7 - - μs
Data hold time tHD:DAT 0 - 0.9 0 - 3.45 μs
Data setup time tSU:DAT 100 - - 250 - - ns
Stop condition setup time tSU:STO 0.6 - - 4.0 - - μs
BUS release time tBUF 1.3 - - 4.7 - - μs
Noise removal valid period tI 0 - 50 0 - 50 ns

*6

Standard-mode and Fast-mode 2-wire serial interface devices must be able to transmit or receive at that speed.

The maximum bit transfer rates of 100 kbit/s for Standard-mode devices and 400 kbit/s for Fast-mode devices

This transfer rates is provided the maximum transfer rates, for example it is able to drive 100 kbit/s of clocks with Fast-mode.

●2 wire Serial Interface Data timing

SCL

SDA

tHD : STA

tBUF

tR

tF

tSU : DAT

tLOW

tHIGH

tHD : DAT

SCL

SDA

tSU : STA

tHD : STA

START BIT

tSU : STO

STOP BIT

Fig.4 Serial data timing Fig.5 Start stop bit timing

●Recommend to power supply turning on operation timing

Parameter Symbol

Recommendation limit

Min. Typ. Max.

Unit

PS input H voltage set-up time TPS 1 - - us
2-wire serial interface input data set-up
time

tI2C 1 - - us

●Sequence of data input timing to power supply

VCC,VM

50%

PS

50%

2-wire serial input

50%

Serial data

Unit

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© 2012 ROHM Co., Ltd. All rights reserved.

tPS tI2C

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BH6456GUL

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●Driving wave setting

○ The structure of the driving wave for SIDM

1cycle=(ta+1)+brake1+tb+brake2

Technical Note

Ⅰ Ⅱ

1osc 1osc1osc1osc 1osc1osc

Ⅲ Ⅳ Ⅴ Ⅵ

Ⅶ

①

②

ta+1

Ⅱcw(ccw) Ⅵ CCW(cw)

*1

Ⅰ.HiZ

*1

The state at A or B and C is HiZ.

*2

At mode=0,the output logic is a setting of a short brake.

dir(address：OH,D2) ① ② Note

Driving wave is set by the 4 parameters of ta / brake1 / tb / brake2.
osc period is set by the osc(Internal CLK basic cycle setting).

ta : On section is ( ta +1-1) = ta counts for cw(ccw) state.
brake1 : On section is (brake1 -1) count for short brake state.
tb : On section is (tb1 -1) count for ccw(cw) state.
brake2 : On section is (brake2 -1) count for short brake state.

（Ex.） In case of setting 1 cycle = 10.67

osc[2:0]( = Basic cycle setting ) = 3’b000（ = Basic cycle = 66.67ns）、and ta / brake1 / tb / brake2 setting below;

brake1

*1

ⅢHiZ

Ⅴ HiZ

Ⅳ Short brake

tb

*1

*2

Ⅶ HiZ

*1

0 OUTA OUTB Move to the direction of Macro

1 OUTB OUTA Move to the direction of ∞

μs、ta = 1.27μs、brake1 = 0.13μs、tb = 1.93μs, brake2 = 7.07μs.

ta[7:0] = 0x13 = 19 count → ON section = 19+1-1= 19 count
brake1[7:0] = 0x03 = 3 count → ON section = 2 count
tb[7:0] = 0x1E = 30 count → ON section = 29 count
brake2[7:0] = 0x6B = 107 count → ON section = 106 count

Ⅷ

brake2

Ⅷ Short brake

*2

CW:Forward rotation

CCW:Reverse rotation

Ⅰ Ⅱ Ⅲ

ta

Ⅱ cw(ccw)

*1

Ⅰ HiZ

Ⅲ HiZ

*1

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© 2012 ROHM Co., Ltd. All rights reserved.

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2012.02 - Rev.