MAX8847Z 查看數據表（PDF） - Maxim Integrated

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MAX8847Z

High-Performance Negative Charge Pump for 6 White LEDs in 3mm x 3mm Thin QFN

Maxim Integrated 

MAX8847Y/MAX8847Z

High-Performance Negative Charge Pump

for 6 White LEDs in 3mm x 3mm Thin QFN

Typical Operating Characteristics (continued)

(VIN = 3.6V, VEN_ = VIN, circuit of Figure 1, TA = +25°C, unless otherwise noted.)

SINGLE-WIRE SERIAL-PULSE

DIMMING RESPONSE (MAX8847Y)

MAX8847Y toc15

VENB

5V/div

0V

TOTAL 96mA

ILED

ILED5

96mA

50mA /div

MAX8847Y, 1x MODE

ALL LEDS OPERATING

24mA FOR

LED1–LED4

0A

20mA /div

0A

10ms/div

LINE TRANSIENT RESPONSE

(VIN = 3.8V TO 3.4V TO 3.8V)

MAX8847Y toc17

3.8V

VIN

3.8V

3.4V

1V/div

200mA /div

IIN

0A

24mA

20mA /div

ILED1

ALL LEDS ON 0A

24mA / LED

1ms/div

PWM DIMMING RESPONSE

MAX8847Y toc19

5V/div

VENA

IIN

ILED1

6  

12mA

40µs/div

100mA /div

0A

20mA /div

LINE TRANSIENT RESPONSE

(VIN = 4.3V TO 3.8V TO 4.3V)

MAX8847Y toc16

4.3V

VIN

4.3V

3.8V

1V/div

100mA /div

IIN

0A

20mA /div

ILED1

ALL LEDS ON 0A

24mA / LED

1ms/div

LINE TRANSIENT RESPONSE

(VIN = 3.5V TO 3.0V TO 3.5V)

MAX8847Y toc18

3.5V

VIN

IIN

3.0V

3.5V 1V/div

200mA /div

0A

20mA /div

ILED1

ALL LEDS ON 0A

16mA / LED

1ms/div

PWM DIMMING LINEARITY

25

20

15

10

5

0

0

20

40

60

80 100

PWM DUTY CYCLE (%)

Maxim Integrated

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