Datasheet > ADM8845ACPZ-WP2

ADM8845ACPZ-WP2

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
亚德诺 - ADI		驱动器泵
页数	文件大小	规格书
20页	372K
描述
Charge Pump Driver for LCD White LED Backlights

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ADM8845ACPZ-WP2 数据手册

ADM8845

SPECIFICATIONS

V_CC= 2.6 V to 5.5 V; T_A= −40°C to +85°C, unless otherwise noted; C1,C2 = 1.0 µF; C3 = 2.2 µF; C4 = 4.7 µF

Table 1.

Parameter

Min

Typ

Max

5.5

Unit

Test Conditions

INPUT VOLTAGE, V_CC

SUPPLY CURRENT, I_CC

2.6

All six LEDs disabled, V_CC= 3.3 V, R_SET= 7.08 kΩ

CTRL1 = 1, CRTL2 = 1

SHUTDOWN CURRENT

CHARGE PUMP FREQUENCY

CHARGE PUMP MODE THRESHOLDS

1.5× to 2×

Accuracy

2× to 1.5×

Accuracy

Hysteresis

1× to 1.5×

µA

1.5

MHz

3.33

3.36

4.77

Accuracy

1.5× to 1×

Accuracy

Hysteresis

4.81

I_SETPIN

LED : LED Matching

LED : I_SETAccuracy

−1

I_LED= 20 mA, V_FB=0.4 V

I_LED= 20 mA, R_SET= 7.08 kΩ, V_FB= 0.4 V, V_CC= 3.6 V,

T_A= 25°C

I_SETPin Voltage

I_LEDto I_SETRatio

1.18

120

0.2

1.2

3.5

MIN COMPLIANCE ON FBx PIN

Charge Pump Output Resistance

0.3

1.8

5.1

Ω

I_SET= 20 mA

1× mode

1.5× mode

2× mode

8.0

LED Current

PWM

kHz

See Note 1 and Figure 21

0.1

200

DIGITAL INPUTS

Input High

0.5 V_CC

Input Low

0.3 V_CC

µA

Input Leakage Current

CHARGE PUMP POWER EFFICIENCY

V_OUTRIPPLE

CTRL1 = 1, CRTL2 = 1, V_CC= 3.4 V, V_FB= 0.2 V, I_FB= 20 mA

V_CC= 3.6 V, I_LED= 20 mA, all six LEDs enabled

m V

_______________________

¹Guaranteed by design. Not 100% production tested.

Rev. 0 | Page 3 of 20

1 234 5 6 7...20

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