AS3820 datasheet(7/52 Pages) DIALOG

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AS3820

16-Channel White LED Controller for LCD Backlight

Rev. 1.1

Datasheet

www.dialog-semiconductor.com

7 of 52

05-Feb-2019

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Thermal Resistance case – ambient

RTHCA

See section 8.10

°C/W

Junction Temperature

-20

115

°C

Supply Voltages

Supply Voltage

VDD

4.5

5.5

Voltage Regulator Output

V3_2

ILOAD = 20mA

3.0

3.2

3.4

Power-on Reset Level

V3_2_POR

Circuit stays in power down

until V3_2 reaches V3_2_POR

1.6

2.2

Under voltage Lockout Level

VDD_UVL

Current outputs are turned

OFF if VDD is lower than

VDD_UVL. This is done by

resetting the CURRx bits.

2.4

2.9

Quiescent Current, PWM = “0”

IDDQ

VDD = 5V, default setting

Supply Current

IDDR

VDD = 5V, HSYNC =

1MHz, VSYNC = 480Hz,

Duty = 50%, VDAC = 250mV

Current Outputs

Trimmed Current Accuracy at 25°C

ILED_500_250

Trimmed during production.

ILED = 100mA,

DACref = 500mV,

VDAC = 250mV,

TJ = 25°C

(excludingerrorofexternalRset)

-0.5

+0.5

Channel to Channel Accuracy at 25°C

ICH_250

ILED=100mA,

DACref = 500mV,

VDAC = 250mV, TJ = 25°C

(excludingerrorofexternalRset)

-0.2

+0.2

Current Accuracy Over VDAC

ILED_500_ALL

DACref = 500mV,

VDAC = 200mV - 500mV,

TJ = 25°C

(excludingerrorofexternalRset)

-1.5

+1.5

Current Accuracy Over VDAC and

Temperature

ILED_500_TMP

DACref = 500mV,

VDAC = 200mV – 500mV

TJ = -20°C to 115°C

(excludingerrorofexternalRset)

-2

Trimmed Current Accuracy at 25°C

ILED_800_250

Trimmed during production.

ILED = 100mA,

DACref = 800mV,

VDAC = 250mV, TJ = 25°C

(excludingerrorofexternalRset)

-0.5

+0.5

All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC

(Statistical Quality Control) methods. VCC = 12V, -40°C ≤ TA ≤ 85°C, unless otherwise specified.

6 Electrical Characteristics

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