ADM8845ACPZ-REEL7;ADM8845ACPZ-REEL;ADM8845EB-EVALZ;中文规格(7)

95

20

90

16

LED CURRENT (mA)

85

EFFICIENCY (%)

04867-0-010

12807570

8

4

6560

04867-0-013

020

4060DUTY CYCLE (%)

80100

0102030

405060DUTY CYCLE (%)

708090100

Figure 9. ILED (mA) vs. PWM Dimming (Varying Duty Cycle),

Six LEDs Enabled, Frequency = 1 kHz

300

Figure 12. LED Efficiency vs. Varying Duty Cycle of 1 kHz PWM Signal,

Six LEDs Enabled, 20 mA/LED

250

SUPPLY CURRENT

ICC (mA

)

200

150

100

02.6

04867-0-011

3.03.4

3.84.24.6SUPPLY VOLTAGE (V)

5.05.4

CH3 1.00V

04867-0-014

50

V

Figure 10. Input Current vs. Supply Voltage,

Six LEDs Enabled Figure 13. Soft Start Showing the Initial In-Rush Current and VOUT Variation,

Six LEDs @ 20 mA/LED, VCC

= 3.6 V

VCCVCC

VOUT

04867-0-012

VOUT

04867-0-015

W

W

M 400ns

W

W

M 400ns

Figure 11. 1.5× Mode Operating Waveforms Figure 14 .2× Mode Operating Waveform

Rev. C | Page 7 of 20

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