BD6076GUT-E2 datasheet(5/16 Pages) ROHM

Part #	BD6076GUT-E2

Description	White Backlight LED Drivers for Small to Medium LCD Panels (Switching Regulator Type)

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Manufacturer	ROHM [Rohm]

Direct Link	http://www.rohm.com

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Technical Note

5/15

BD6076GUT

www.rohm.com

2011.12 - Rev.A

●

Electrical characteristic curves (Reference data) – Continued

2.IIN

Δ=1.66V

5.3ms

Idd=1.5mA

1.VOUT

1V/div AC

2.IIN

200mA/div DC

(4ms/div)

1.VOUT

Peak=155mA

1.EN

4.Icoil

3.VFB

2.VOUT

VoutDrop=76mVpp

1.EN

2V/div DC

2.VOUT 100mV/div AC

3.VFB 0.5V/div DC 4.IIN

200mA/div DC

(3ms/div)

Fig.13 LED Open output voltage

Fig.14 LED brightness adjustment

Fig.15 Soft Start

(Cout=4.7µH, ILED=15mA)

Vin=3.6V

Ta=25℃

1.EN

2.VOUT

3. VFB

4. IIN

Peak=410mA

1.EN

5V/div DC

2.VOUT

5V/div DC

3.VFB 0.5V/div DC 4.IIN

200mA/div DC

(200µs/div

)

0

50

100

150

200

250

300

350

400

450

500

0

1020

30

405 06070

80

90

100

Duty[%]

VIN=4.2V

VIN=3.6V

VIN=5.5V

VIN=3.1V

Fig.16 LED brightness adjustment

for PWM control

0

10

20

30

40

50

0

2468

10

Duty[%]

VIN=3.6V

VIN=3.1V

VIN=4.2V

VIN=5.2V

Fig.17 LED brightness adjustment

for PWM control (Expansion)

Fig.18 VBAT Line Transient

(Cout=4.7µH, ILED=15mA)

Vin: 3.1V  2.8V

1.VIN 200mV/div DC 2.VOUT 100mV/div AC

3.VFB 50mV/div AC

1.VIN

2.VOUT

3. VFB

3.1V

2.8V

600µs

10µs

Vout=100mVpp

Vfb=30mVpp

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