LTC3550-1 データシートの表示（PDF） - Linear Technology

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LTC3550-1

Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

Linear Technology 

LTC3550-1

PI FU CTIO S

DCIN (Pin 16): Wall Adapter Input Supply Pin. Provides

power to the battery charger. The maximum supply

current is 950mA. This should be bypassed with a 1µF

capacitor.

Exposed Pad (Pin 17): GND. The exposed backside of the

package is ground and must be soldered to the PCB ground

for electrical connection and maximum heat transfer.

BLOCK DIAGRA

DCIN

16

BAT

USBIN

15

1

CC/CV

REGULATOR

CC/CV

REGULATOR

1mA MAX

USBPWR 13

10mA MAX

PWR 4

10mA MAX

CHRG 5

+

4.15V

–

DCIN UVLO

+

BAT –

DC

SOFT-

START

USB

SOFT-

START

USBIN UVLO

3.95V

BAT

ENABLE 12

RECHRG

LOGIC

TERM

RENABLE

4.1V

RECHARGE

BAT

DC_ENABLE USB_ENABLE

CHARGER CONTROL

SQ

RQ

RS LATCH

THERMAL

REGULATION

TDIE

105°C

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

TERMINATION

100mV

IBAT

/1000

IBAT

/1000

IBAT

/1000

OSC

SLOPE

COMP

ITH

EA

BURST

CLAMP

ICOMP

ANTI-

SHOOT-

THRU

IRCMP

FREQ

SHIFT

6 VOUT

R1

0.6V

R2

7 VCC

5Ω

10 SW

3

ITERM

RITERM

14

IDC

RIDC

2

IUSB

RIUSB

11

RUN

8, 9, 17

GND

35501f

11

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