MAX6948B MAXIM [Maxim Integrated Products], MAX6948B Datasheet - Page 8

• Manufacturer Part Number: MAX6948B
• Description: High-Efficiency PWM LED Driver with Boost Converter and Five Constant-Current GPIO Ports
• Manufacturer: MAXIM [Maxim Integrated Products]

High-Efficiency PWM LED Driver with Boost
Converter and Five Constant-Current GPIO Ports
8
A5, B4, B5
C2, D2
D4, D5
E4, E5
PIN
A1
A2
A3
A4
B1
B2
B3
C1
C3
C4
C5
D1
D3
E1
E2
E3
LEDSW
NAME
COMP
PGND
GND
SDA
N.C.
OUT
RST
SCL
V
AD0
I.C.
V+
P0
P1
P2
P3
FB
P4
LX
DD
GPIO Port. Open-drain I/O. P0 can be configured as a 30mA (max) constant sink current output.
Active-Low Reset Input
I
I
Boost-Converter Supply Voltage and Positive Supply Voltage. Bypass V+ to GND with a 2.2FF or
higher value ceramic capacitor.
GPIO Port. Open-drain I/O. P1 can be configured as a 30mA (max) constant sink current output.
I
Address Input. AD0 selects up to four device slave addresses (Table 13).
GPIO Port. Open-drain I/O. P2 can be configured as a 10mA (max) constant sink current output.
Ground. Connect to PGND.
No Connection. Internally not connected.
Internally Connected. Connect I.C. to GND for normal operation.
Compensation Terminal for the Boost Converter. A capacitor from COMP to PGND determines the
boost-converter stability.
GPIO Port. Open-drain I/O. P3 can be configured as a 10mA maximum constant sink current output.
Load Current-Sense Voltage Feedback for the Boost Converter. A resistor between FB and PGND
sets the maximum load current.
Power Ground. Connect PGND to GND.
GPIO Port. Open-drain I/O. P4 can be configured as a 10mA (max) constant sink current output.
Output Voltage Sense Input for Boost Converter
High-Voltage, Constant-Current Input. Connect LEDSW to the cathode-end of the WLED string.
Inductor Switch Node
2
2
2
C-Compatible, Serial-Clock Input
C-Compatible, Serial-Data I/O
C Logic Supply Voltage. Bypass V
C1
D1
P0
A1
P1
B1
P2
P3
P4
E1
GND
GND
RST
V DD
OUT
A2
B2
C2
D2
E2
(2.31mm x 2.31mm)
(BUMP IN BOTTOM)
TOP VIEW
MAX6948B
LEDSW
WLP
N.C.
SCL
AD0
C3
D3
A3
B3
FB
E3
DD
to GND with a 0.1FF or higher value ceramic capacitor.
PGND
SDA
I.C.
A4
V+
B4
C4
D4
LX
E4
FUNCTION
COMP
PGND
C5
D5
V+
A5
V+
B5
LX
E5
Pin Configuration
Pin Description