MAX8607 Maxim Integrated Products, MAX8607 Datasheet - Page 5

• Manufacturer Part Number: MAX8607
• Description: 1MHz PWM Boost Converter
• Manufacturer: Maxim Integrated Products

(Circuit of Figure 2, V
11, 12
9, 10
PIN
13
14
—
1
2
3
4
5
6
7
8
NAME
COMP
PGND
LGND
OUTS
FLSH
MOV
GND
OUT
EN1
EN2
LED
400
350
300
250
200
150
100
LX
EP
50
0
1
_______________________________________________________________________________________
IN
= V
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.
R
Flash Current Program Input. Connect a resistor from FLSH to GND to set the LED current in flash mode.
R
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.
LE D C ur r ent Reg ul ator . C onnect LE D to the cathod e of the exter nal LE D . LE D i s hi g h im p ed ance d ur i ng shutd ow n.
P ow er Gr ound . C onnect P GN D to the i np ut cap aci tor g r ound . Al so, connect P GN D to the P C b oar d g r ound p l ane.
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.
Outp ut S ense and IC S up p l y Inp ut. C onnect OU TS to OU T at the outp ut b yp ass cap aci tor . The IC ’ s op er ati ng
p ow er i s sup p l i ed fr om OU TS .
Exposed Paddle. Connect the exposed paddle to GND directly under the IC and to a large PC board
ground plane for increased thermal performance.
MOVIE-MODE LED CURRENT
MOV
FLSH
EN1
vs. MOV RESISTANCE
= 3.6V, V
1MHz PWM Boost Converter for 1.5A
must be greater than 2kΩ.
must be greater than 2kΩ.
R
MOV
10
(kΩ)
EN2
= 0V, T
Typical Operating Characteristics (continued)
100
A
= +25°C, unless otherwise noted.)
White LED Camera Flash
FUNCTION
1600
1400
1200
1000
800
600
400
200
0
1
FLASH-MODE LED CURRENT
vs. FLSH RESISTANCE
R
FLSH
10
(kΩ)
Pin Description
100
5