ROHM BH1621FVC Technical data

Ambient Light Sensor IC Series

Analog Current Output Type
Ambient Light Sensor IC

BH1621FVC

●Descriptions

BH1621FVC is an analog current output ambient light sensor. This IC is the most suitable to obtain the ambient light data for
adjusting LCD and Keypad backlight of Mobile phone for power saving and better visibility

●Features

1) Compact surface mount package 1.6 × 1.6 mm

2) Spectral sensitivity close to human eyes sensitivity.

3) Output current in proportion to brightness.

4) Supply voltage operates from 2.4V to 5.5V

5) Built-in shutdown function

6) 2 steps controllable output current gain.

7) 1.8V logic input interface

8) Low sensitivity variation (+/-15%)

●Applications

Mobile phone, LCD TV, PDP TV, Laptop PC, Portable game console, Digital camera, Digital video camera, PDA,
LCD display

●Absolute Maximum Ratings

Parameter Symbol Ratings Units

Supply Voltage Vmax

Operating Temperature Topr -40~85 ℃

7 V

No.12046EDT02

Storage Temperature Tstg -40~100 ℃

Iout Current Ioutmax 7.5 mA

Power Dissipation Pd 165※ mW

※ 70mm × 70mm × 1.6mm glass epoxy board. Derating at 2.2 mW/℃ for operating above Ta=25℃.

●Operating Conditions

Parameter Symbol

VCC Voltage Vcc 2.4 3.0 5.5 V

Ratings

Min. Typ. Max.

Units

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1/9

2012.02 - Rev.D

BH1621FVC

●Electrical Characteristics ( VCC = 3.0V, Ta = 25℃, unless otherwise noted )

Parameter Symbol

Min. Typ. Max.

Limits

Units Conditions

Supply Current1 ( Operate ) Icc1 51 74 97 µA Ev=100 lx ( H-Gain Mode ) ※

Supply Current2 ( 0 lx ) Icc2 4.5 9 13.5 µA Ev=0 lx ( H-Gain Mode )

Technical Note

Supply Current3 ( Shutdown ) Icc3sd - 0.2 0.4 µA V

IOUT Output Current1
( Dark Current )

Iout1 - - 0.2 µA Ev=0 lx

GC1=V GC2

=0 No Input Light

IOUT Output Current2 Iout2 51 60 69 µA Ev=100 lx ( H-Gain Mode ) ※

Peak Wave Length λp - 560 - nm

Incandescent/Fluorescent
Light Current Ratio

Saturated Output Voltage V

rIF - 1.0 - times Ev=100 lx

2.6 2.9 3.0 V

OMAX

Ev=100 lx, RL=220kΩ
( H-Gain Mode )

GC1,GC2 Input 'L' Voltage VIL 0 - 0.4 V

GC1,GC2 Input 'H' Voltage1 V

GC1,GC2 Input 'H' Voltage2 V

Wake-up Time twu - 45 128 µs

Gain Ratio
H-Gain Mode / L-Gain Mode

※ White LED is used as optical source

1.4 - Vcc V 2.4V ≦ Vcc ≦ 3.6V

IH1

2.0 - Vcc V 3.6V ＜ Vcc ≦ 5.5V

IH2

Shutdown → H-Gain Mode
Ev=100lx

rHL - 9.5 10 times Ev=100lx

※

※

※

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2/9

2012.02 - Rev.D

BH1621FVC

Technical Note

●Reference Data

1.2

1.0

0.8

0.6

Ratio

0.4

0.2

0.0

400 500 600 700 800 900 1000 1100

Wave length [ nm ]

Fig.1 Spectral Response

1.2

1

0.8

受信指向角特性

0.6

Ratio

0.4

0.2

0

-90 -60 -30 0 30 60 90

1pin

-

Angle [ deg ]

+

Fluorescent

Light

Incandescent

Light

Halogen Light

Kripton Light

Artifical Sun

Light

White LED

00.511.52

Ratio

Fig.2 Light Source Dependency

( Fluorescent Light is set to '1' )

1.2

1

0.8

暗電流温特

0.6

Ratio

0.4

0.2

0

-90 -60 -30 0 30 60 90

Angle [ deg ]

-

1pin

+

100000

10000

1000

100

10

1

IOUT [ uA ]

0.1

0.01

0.01

0.001

0 1 100 10,000 1,000,000

H-Gain

照度

[ lx ]

Fig.3 Illuminance - IOUT

Characteristics

100

10

1

0.1

IOUT [ uA ]

0.01

0.001

-40 -20 0 20 40 60 80 100

Ta [ ℃ ]

Fig.4 Directional Characteristics 1 Fig.5 Directional Characteristics 2 Fig.6 Ta – IOUT ( 0 lx )

L-Gain

H-Gain

L-Gain

SD

100

10

1

0.1

ICC [ uA ]

0.01

0.001

-40-200 20406080100

Ta [ ℃ ]

Fig.7 Ta – ICC ( 0 lx )

1000

100

10

WakeupTime [ us ]

1

100 1000 10000

L-Gain

H-Gain

Illuminance [ lx ]

H-Gain
L-Gain

SD

1.4

1.2

1

0.8

Ratio

0.6

0.4

0.2

0

-40 -20 0 20 40 60 80 100

Ta [ ℃ ]

Fig.8 IOUT Temperature dependency

( 100 lx )

1.4

1.2

1.0

0.8

0.6

Ratio

0.4

0.2

0.0

2 2.5 3 3.5 4 4.5 5 5.5 6

VCC [ V ]

Fig.9 IOUT VCC dependency

Fig.10 Illuminance – Wake up Time

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

3/9

2012.02 - Rev.D