AS3647-ZWLT【PDF 7/38 页】IC LED DVR 1600MA FLASH 13WLCSP

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AS3647/47B

Datasheet, Confidential - E l e c t r i c a l C h a r a c t e r i s t i c s

6 Electrical Characteristics

V VIN = +2.7V to +4.4V, T AMB = -30oC to +85oC, unless otherwise specified. Typical values are at V VIN = +3.7V, T AMB =

+25oC, unless otherwise specified.

Table 4. Electrical Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

General Operating Conditions

V VIN

Supply Voltage

pin VIN

2.7

3.7

4.4

V

V VIN <3.7V

V VINREDUCE

D_FUNC

I SHUTDOWN

I STANBY

Supply Voltage

Shutdown Current

Standby Current

AS3647/47B functionally working, but not all

parameters fulfilled

TXMASK/TORCH=L, SCL=SDA=0V,

V VIN <3.7V

interface active, TXMASK/TORCH=L,

1

2.5

4.4

0.6

1.0

2.7

5.5

2.0

10

V

μA

μA

LED_OUT1,2=1300mA , t FLASH <300ms

T AMB

Eta

Operating

Temperature

Application Efficiency

(DCDC and current

sink)

L COIL =0.6μH@3A, L ESR =60m ? ,

2

-30

25

84

85

oC

%

DCDC Step Up Converter

V VOUT

V VOUT5V

R PMOS

R NMOS

DCDC Boost output

Voltage

(pin VOUT1/2)

DCDC Boost output

Voltage

(pin VOUT1/2)

On-resistance

On-resistance

constant voltage mode operation

const_v_mode (see page 25) =1

DCDC internal PMOS switch

DCDC internal NMOS switch

2.8

5.0

70

70

5.5

V

V

m ?

m ?

f CLK

Operating Frequency

All internal timings are derived from this

oscillator

-7.5%

4.0

+7.5%

MHz

Current Sinks

V LED

LED forward voltage

single LED at 1600mA

2.8

3.5

4.2

V

I LED_OUT

I LED_OUT ?

I LED_OUT

RAMP

I LED_OUT

RIPPLE

V ILED_COMP

LED_OUT1/2 current

sinks output combined

LED_OUT1/2 current

sink accuracy

LED_OUT1/2 ramp

time

LED_OUT current

ripple

LED_OUT current

sink voltage

compliance

single LED

I LED_OUT >=800mA or I LED_OUT <500mA

0oC < T J < 100oC

500mA<I LED_OUT <800mA, 0oC < T J < 100oC

Ramp-up During startup

Ramp-down

I LED_OUT = 1000mA, BW=20MHz

Minimum voltage between pin LED_OUT1/2

and GND for operation of the current sink

0

-7

-5

250

500

20

325

1600

+7

+5

1000

1000

mA

%

%

μs

μs

mA PP

mV

Comparator Low VDS

V LOW_VDS

V HIGH_VDS Comparator High VDS low vds and high vds comparator - see 4MHz/

1MHz Operating Mode Switching on page 13

900

320

mV

I LEAK _

LED_OUT

LED_OUT1/2

Leakage Current

Pins LED_OUT1 and LED_OUT2

-1.0

0.0

+1.0

μA

Protection and Fault Detection Functions (see page 13)

www.austriamicrosystems.com/AS3647

1.5-4

6 - 37

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