MAX8607 データシートの表示（PDF） - Maxim Integrated

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MAX8607

1MHz PWM Boost Converter for 1.5A White LED Camera Flash

Maxim Integrated 

1MHz PWM Boost Converter for 1.5A

White LED Camera Flash

Typical Operating Characteristics (continued)

(Circuit of Figure 2, VIN = VEN1 = 3.6V, VEN2 = 0V, TA = +25°C, unless otherwise noted.)

400

350

300

250

200

150

100

50

0

1

MOVIE-MODE LED CURRENT

vs. MOV RESISTANCE

10

100

RMOV (kΩ)

1600

1400

1200

1000

800

600

400

200

0

1

FLASH-MODE LED CURRENT

vs. FLSH RESISTANCE

10

100

RFLSH (kΩ)

PIN

1

2

3

4

5

6

7

8

9, 10

11, 12

13

14

—

Pin Description

NAME

COMP

EN1

EN2

MOV

FLSH

GND

LGND

LED

PGND

LX

OUT

OUTS

EP

FUNCTION

Compensation Input. Connect a 0.1µF ceramic capacitor from COMP to GND for regulator stability.

Enable Input 1. EN1 and EN2 set the operating mode (see Table 1).

Enable Input 2. EN1 and EN2 set the operating mode (see Table 1).

Movie Current Program Input. Connect a resistor from MOV to GND to set the LED current in movie mode.

RMOV must be greater than 2kΩ.

Flash Current Program Input. Connect a resistor from FLSH to GND to set the LED current in flash mode.

RFLSH must be greater than 2kΩ.

Analog Ground. Connect GND to the exposed paddle directly under the IC.

LED Current Regulator Ground. Connect LGND to the ground plane on the PC board.

LED Current Regulator. Connect LED to the cathode of the external LED. LED is high impedance during shutdown.

Power Ground. Connect PGND to the input capacitor ground. Also, connect PGND to the PC board ground plane.

Inductor Connection. Connect LX to the switched side of the inductor. LX is internally connected to the

drains of the internal MOSFETs. Both MOSFETs are off during shutdown.

Regulator Output. Connect OUT to the anode of the external LED. Bypass OUT to PGND with a 10µF or

larger ceramic capacitor. During shutdown, OUT is one body-diode drop below the input voltage.

Output Sense and IC Supply Input. Connect OUTS to OUT at the output bypass capacitor. The IC’s operating

power is supplied from OUTS.

Exposed Paddle. Connect the exposed paddle to GND directly under the IC and to a large PC board

ground plane for increased thermal performance.

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