BD6066GU_11 ROHM [Rohm], BD6066GU_11 Datasheet

BD6066GU_11

Manufacturer Part Number

BD6066GU_11

Description

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

Manufacturer

ROHM [Rohm]

Datasheet

1.BD6066GU_11.pdf (16 pages)

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LED Drivers for LCD Backlights

White Backlight LED Drivers

for Medium to Large LCD Panels

(Switching Regulator Type)

●Description

●Features

●Applications

● Absolute maximum ratings (Ta=25 ℃)

www.rohm.com

BD6066GU, BD6066EKN

BD6066GU/BD6066EKN are white LED driver ICs with PWM step-up DC/DC converter that can boost max 40.5V and

current driver that can drive max 30mA. The wide brightness can be adjusted to control by external PWM pulse on power

control terminal. And, with extended resolution current driver, a few errors between the lines of the current driver, it is suitable

for decreasing the lacking in brightness of the display. BD6066GU, CSP package type, is suited for saving space.

BD6066EKN, HQFN package type, is suited for mounting on the flexible board.

Notebook PC, portable DVD player, car navigation systems

(*1) The measurement value which was mounted on the PCB by ROHM. When it’s used by more than Ta=25 ℃, it’s reduced by 8.8mW/ ℃.

(*2) Reduced 4.5mW/ ℃ With Ta>25 ℃ when not mounted on a heat radiation Board.

(*3) 70mm x 70mm x 1.6mm glass epoxy Board which has 1 layers (60mm x 60mm). When it’s used by more than Ta=25 ℃, it’s reduced by 7.0mW/ ℃.

(*4) 70mm x 70mm x 1.6mm glass epoxy Board which has 2 layers (60mm x 60mm). When it’s used by more than Ta=25 ℃, it’s reduced by 21.2mW/ ℃.

Maximum applied voltage 1

Maximum applied voltage 2

Maximum applied voltage 3

Maximum applied voltage 4

Power dissipation 1 (BD6066GU)

Power dissipation 2 (BD6066EKN)

Power dissipation 3 (BD6066EKN)

Power dissipation 4 (BD6066EKN)

Operating temperature range

Storage temperature range

1) High efficiency PWM step-up DC/DC converter (fsw=1MHz)

2) Extended resolution current driver 4ch

3) Driving

4) Wide input voltage range (2.7V ~ 22V)

5) Rich safety functions

6) CSP small & thin package

▪ Over-voltage protection (OVP)

▪ Over current limit

▪ External SBD open detect

▪ Thermal shutdown (175 ℃)

＊

Parameter

12 series × 4parallel =48 white LEDs (

VCSP85H2 2.6 × 2.6 × 0.85mm

HQFN28V

VMAX1

VMAX2

VMAX3

VMAX4

Symbol

Topr

Tstg

Pd1

Pd2

Pd3

Pd4

5.2 × 5.2 × 0.95mm

＊

white LED Vf=3.2Vmax)

1/15

-55 ~ +150

-30 ~ +85

1100

2650

Limits

560

880

15.5

30.5

50.5

Unit

℃

TEST,ISET,VREG,SENSP,

SENSN, SW, EN1, EN2, PWM

LED1, LED2, LED3, LED4

VBAT

VDET

Condition

2011.06 - Rev.B

No.11040EBT26

Related parts for BD6066GU_11

BD6066GU_11 Summary of contents

Page 1

LED Drivers for LCD Backlights White Backlight LED Drivers for Medium to Large LCD Panels (Switching Regulator Type) BD6066GU, BD6066EKN ●Description BD6066GU/BD6066EKN are white LED driver ICs with PWM step-up DC/DC converter that can boost max 40.5V and current driver ...

Page 2

BD6066GU,BU6066EKN ●Recommended operating range (Ta=-30 ℃ ~ +85 ℃) Parameter BD6066GU Power supply voltage BD6066EKN ●Electrical characteristic (Unless otherwise specified, VBAT=12V +25 ℃) Parameter [EN Terminal] EN threshold voltage (Low) EN threshold voltage (High threshold voltage ...

Page 3

BD6066GU,BU6066EKN ●Reference data 5 85℃ 25℃ -30℃ VBAT [V] Fig.1 Current Consumption - power source voltage 44 43 25℃ -30℃ 85℃ ...

Page 4

BD6066GU,BU6066EKN 100 25℃ -30℃ 70 85℃ VBAT[V] Fig.13 Efficiency - source voltage 25 VBAT=7.4V ISET=27kΩ ℃ -30 ℃ ℃ 5 ...

Page 5

BD6066GU,BU6066EKN ●Block diagram, I/O equivalent circuit diagram VBAT VREG EN1 Clump EN2 REG Internal Power suplly Clump PWM SBD Open protect TSD over voltage protect PWMcomp S - Control SW sence + Q R SENSP Current Sence SENSN LED TERMINAL ...

Page 6

BD6066GU,BU6066EKN ●Application example Battery 4.7μH RB160M-60 10μF (25V) 2.2μF (50V) RTR020N05 SENSP 68mΩ A1 SENSN Power E5 EN1 ON/OFF E3 EN2 E1 PWM 200Hz PWM VBAT E4 E2 VREG 1μF(10V) TEST GND GND A2 D1 Fig.25 LED ...

Page 7

BD6066GU,BU6066EKN ●Description of Functions 1) PWM current mode DC/DC converter While BD6066GU/EKN is power ON, the lowest voltage of LED1 detected, PWM duty is decided to be 0.5V and output voltage is kept invariably. As for ...

Page 8

BD6066GU,BU6066EKN 5) Over Current Limit Over current flows the current detection resistor that is connected to switching transistor source and between GND, SENSP pin voltage turns more than detection voltage, over current protection is operating and it is prevented from ...

Page 9

BD6066GU,BU6066EKN ●Start control and select constant current driver BD6066GU/EKN can control the start conditions by EN1, 2 terminal and PWM terminal, and sets 0.2V or below EN1, 2 terminal or sets 0.2 or below PWM terminal and IC can power ...

Page 10

BD6066GU,BU6066EKN ●Setting of LED current and current range LED current can set up resistance value (RISET) connecting to ISET, LED current setting range is 4mA~30mA. Setting of LED current is given as shown below. LED current = 20mA × ( ...

Page 11

BD6066GU,BU6066EKN ●Selection of external parts Recommended external parts are as shown below. When to use other parts than these, select the following equivalent parts. Coil Value Manufacturer Product number 4.7μH TOKO B1015AS-4R7N 4.7μH TAIYO YUDEN NR4012T4R7M 4.7μH TAIYO YUDEN NR4018T4R7M ...

Page 12

BD6066GU,BU6066EKN ●PCB Layout In order to make the most of the performance of this IC, its PCB layout is very important. Characteristics such as efficiency and ripple and the likes change greatly with layout patterns, which please note carefully. to ...

Page 13

BD6066GU,BU6066EKN ●Recommended PCB layout Cin L Tr SBD Cout Creg Rsense Fig.33 BD6066EKN Component side（Top view） ●Attention point of PCB layout In PCB layout design, the wiring of power supply line should be low Impedance, and put the bypass capacitor ...

Page 14

BD6066GU,BU6066EKN ●Notes for use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short ...

Page 15

BD6066GU,BU6066EKN ●Ordering part number Part No. Part No. 6066 VCSP85H2 (BD6066GU) 1PIN MARK 2.60±0.1 0.08 S 17- φ 0.3±0.05 0. φ 0.15)INDEX POST ...

Page 16

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...

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