ADT6780 参数 Datasheet PDF下载

Thermally enhanced Low V

FB

Step-Down LED Driver

ADT6780

Functional Block Diagram

EN

7

VIN

2

Current

Sense

Amplifier

+

-

Shutdown

Internal

Regulator

Voltage

Reference

OSC

Regulator

R

S

1 BST

Σ

Current

Limit

+

+

-

FB 5

-

Error

Amplifier

6

COMP

Comparator

Control

LOGIC

Driver

3 SW

Driver

8

SS

4

GND

Figure 2. Functional Block Diagram

Absolute Maximum Ratings

(Note1)

Parameter

Power supply voltage

SW pin voltage

BST pin voltage

All Other Pins

Max. power dissipation (Ta=25℃) (Note2)

Thermal resistance (Note3)

Storage temperature

Junction temperature

Symbol

V

IN

V

SW

V

BST

-

Min.

-0.3

-0.5

-0.3

-0.3

-

-

-65

-

Typ.

-

-

-

-

-

60

-

-

Max.

30

V

IN

+ 0.3

V

SW

+ 6

+6

2.08

-

+150

+150

Unit

V

V

V

V

W

℃/W

℃

℃

P

D

Θ

JA

T

STG

T

J.MAX

Note1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

Note2. Derate 17mW/℃ above +25℃. This is recommended to operate under this power dissipation specification.

Note3. Measured on JESD51-7, 4-layer PCB

Operating Ratings

Parameter

Power supply voltage

Output voltage

Operating temperature

Junction temperature

Symbol

V

IN

V

OUT

T

OPR

T

J

Min.

4.5

0.2

-40

-

Typ.

12.0

-

-

-

Max.

28.0

16

+85

+125

Unit

V

V

℃

℃

* This specifications are subject to be changed without notice

Jul. 12. 2012 / Preliminary

3/13

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