Revision 1.8

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AS3833

Datasheet - 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

parameters with min. and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods.

Table 3. Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

General

Operating Temperature Range

apply proper cooling to stay below maximum

allowed TJ.

-20

+85

°C

Operating Junction Temperature

-20

+115

°C

Power supply

Supply Voltage

+12

+50

V

Driver supply voltage regulator output

+9

V

3V voltage regulator output

+3.3

V

Operating Current Consumption

UVLO=2V, PWM1=0, Rset=6k

Ω, Vth=0.47V

4.6

5.0

5.6

mA

Quiescent Current Consumption

UVLO=0V, PWM1=0, Rset=6k

Ω, Vth=0.47V

2.25

2.50

2.75

mA

Current sink parameters

Trimmed current accuracy

ILED=100mA, Tj = 25°C

excluding error of Rset

-0.8

+0.8

%

current accuracy

ILED=50

1

to 250mA, BJT

β>50

Tj = -20 to +115°C

-1.5

+1.5

%

Channel to channel accuracy

ILED=100mA, Tj = 25°C

-0.6

+0.6

%

Reference Voltage at pins Iset

+1.18

+1.20

+1.22

V

Ratio

Ratio = ILED/Iset

500

Base output current limit

5.5

7.5

mA

Short detection comparator

Over-Temperature protection accuracy

-10

+10

mV

Power supply regulation

BJT beta threshold

45

48

52

Boost controller oscillator

Oscillator frequency

220

250

280

kHz

Boost controller PWM

Maximum duty cycle

85

87

89

%

Boost controller error amplifier

Reference Voltage at pin FB

+1.23

+1.25

+1.27

V

Voltage gain

80

dB

BW

Bandwidth

AV = 0dB

2

MHz

Voltage sense input current

pins FB

0.1

0.2

µ A

Compensation output current

pins COMP, Vcomp = 1V

10

µ A

Boost controller over current protection

Current sense threshold

pin SENSE

+600

+800

+1000

mV