Datasheet > CAT3644

CAT3644

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
CATALYST		驱动器
页数	文件大小	规格书
14页	294K
描述
4-Channel Ultra High Efficiency Quad-Mode TM LED Driver

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CAT3644 数据手册

CAT3644

ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

V_IN, LEDx, C1±, C2± voltage

V_OUTvoltage

EN/DIM voltage

Storage Temperature Range

Junction Temperature Range

Lead Temperature

-65 to +160

-40 to +125

300

°C

RECOMMENDED OPERATING CONDITIONS

Parameter

Rating

Unit

V_IN

2.5 to 5.5

-40 to +85

0 to 25

Ambient Temperature Range

I_LEDper LED pin

°C

Total Output Current

LED Forward Voltage Range

0 to 100

1.3 to 4.3

Typical application circuit with external components is shown on page 1.

ELECTRICAL OPERATING CHARACTERISTICS

(over recommended operating conditions unless specified otherwise) V_IN= 3.6V, EN = High, T_AMB= 25°C

Symbol Name

Conditions

Min

Typ

Max

Units

1x mode, no load

1.33 x mode, no load

1.5x mode, no load

2x mode, no load

1.0

1.7

2.2

2.4

I_Q

Quiescent Current

I_QSHDN

Shutdown Current

V_EN= 0V

µA

I_LED-ACCLED Current Accuracy

I_LED-DEVLED Channel Matching

I_LEDAVG/ I_{LEDAVG-NOMINAL}

(I_LED- I_LEDAVG) / I_LEDAVG

±2

±1.5

0.6

V_RSET

RSET Regulated Voltage

0.58

0.62

1x mode

0.8

ꢀ

MHz

1.33x mode, V_IN= 3V

1.5x mode, V_IN= 2.7V

2x mode, V_IN= 2.4V

1.33x and 2x mode

1.5x mode

R_OUT

Output Resistance (open loop)

0.8

1.3

1.6

F_OSC

Charge Pump Frequency

1.3

I_{SC_MAX}Output short circuit Current Limit

I_{IN_MAX}Input Current Limit

V_OUT< 0.5V

V_OUT> 1V

250

LED_TH1x to 1.33x or 1.33x to 1.5x or 1.5x to 2x

Transition Thresholds at any LED pin

130

400

V_HYS

T_DF

1x Mode Transition Hysteresis

Transition Filter Delay

500

µs

EN/DIM Pin

• Internal Pull-down Resistor

• Logic High Level

• Logic Low Level

R_EN/DIM

V_HI

V_LO

100

kꢀ

1.3

1.6

0.4

2.0

T_SD

T_HYS

V_UVLO

Thermal Shutdown

150

°C

Thermal Hysteresis

Undervoltage lockout (UVLO) threshold

1.8

Doc. No. 5023, Rev. B

Characteristics subject to change without notice

123 4 5 6 7...14

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