MAX6948B MAXIM [Maxim Integrated Products], MAX6948B Datasheet - Page 5

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

Converter and Five Constant-Current GPIO Ports
TIMING CHARACTERISTICS
(Typical Application Circuit, V+ = 2.7V to 5.0V, V
V+ = 3.3V, V
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note 10: Input filters on the SDA, SCL, and AD0 inputs suppress noise spikes less than 50ns.
Internal Boost-Converter PWM
Clock Frequency
Internal GPIO PWM Clock
Frequency
SCL Serial-Clock Frequency
Bus Free Time Between a STOP
and START Condition
Hold Time (Repeated) START
Condition
Repeated START Condition Setup
Time
STOP Condition Setup Time
Data Hold Time
Data Setup Time
SCL Clock Low Period
SCL Clock High Period
Rise Time of Both SDA and SCL
Signals, Receiving
Fall Time of Both SDA and SCL
Signals, Receiving
Fall Time of SDA Transmitting
Pulse Width of Spike Suppressed
Serial Bus Timeout
Capacitive Load for Each Bus
Line
RST Pulse Width
All parameters are tested at T
The DI
Current matching is defined as the percent error of any individual port from the average current of the maximum value
measured and the minimum value measured. It can be found using the equation DI
I
Guaranteed by design.
A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
bridge the undefined region of SCL’s falling edge.
I
MMAVG
SINK
PARAMETER
DD
High-Efficiency PWM LED Driver with Boost
P 6mA. C
= 2.5V, T
PORT_
where I
specifies current matching between ports of a single part.
b
A
MMAVG
= total capacitance of one bus line in pF. t
= +25NC.) (Note 4)
= (I
SYMBOL
f
MEASMAX
INT_GPIO
t
t
t
t
t
HD, STA
SU, STO
HD, DAT
SU, DAT
BOOST
SU, STA
t
t
A
t
f
t
t
f
HIGH
F, TX
LOW
INT_
BUF
OUT
SCL
t
C
t
t
t
SP
W
= +25NC. Specifications over temperature are guaranteed by design.
R
F
b
+ I
DD
(Note 8)
(Notes 7, 9)
(Notes 7, 9)
(Notes 7, 9)
(Notes 7, 10)
(Note 7)
MEASMIN
= 1.7V to V+, T
)/2.
CONDITIONS
A
= T
R
and t
MIN
F
to T
are measured between 0.3 x V
MAX
, unless otherwise noted. Typical values are at
PORT_
MIN
180
1.3
0.6
0.6
0.6
1.3
0.7
98
24
20
1
= 100 x (I
IL
of the SCL signal) to
0.1C
0.1C
0.1C
31.25
20 +
20 +
20 +
TYP
125
50
30
b
b
b
DD
MMAVG
and 0.7 x V
MAX
145
400
300
300
250
400
0.9
38
50
- I
MEAS
UNITS
DD
kHz
kHz
kHz
ms
pF
Fs
Fs
Fs
Fs
Fs
ns
Fs
Fs
ns
ns
ns
ns
Fs
)/
.
5