MAX6964AEG+T Maxim Integrated Products, MAX6964AEG+T Datasheet - Page 15

• Manufacturer Part Number: MAX6964AEG+T
• Description: IC LED DRIVER LINEAR 24-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Linear (I²C Interface)r

Specifications of MAX6964AEG+T

• Topology: Open Drain, PWM
• Number Of Outputs: 17
• Internal Driver: Yes
• Type - Primary: Backlight, LED Blinker
• Type - Secondary: RGB, White LED
• Frequency: 400kHz
• Voltage - Supply: 2 V ~ 3.6 V
• Voltage - Output: 7V
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 50mA
• Internal Switch(s): Yes
• Number Of Segments: 12
• Low Level Output Current: 50 mA
• Operating Supply Voltage: 2 V to 3.6 V
• Maximum Supply Current: 122.1 uA
• Maximum Power Dissipation: 761 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details

enabled with the global intensity flag G in the configu-
ration register (Table 4). When global PWM control is
used, the 4 bits of master intensity and 4 bits of global
intensity effectively combine to provide an 8-bit, 240-
step intensity control applying to all outputs.
It is not possible to apply global PWM control to a sub-
set of the ports, and use the others as logic outputs. To
mix static logic outputs and PWM outputs, individual
PWM control must be selected (Table 8).
The RST input, BLINK input, and serial interface SDA,
SCL, AD0 remain high impedance with up to 6V assert-
ed on them when the MAX6964 is powered down (V+ =
0V). Ouptut ports O0–O16 remain high impedance with
Figure 13. Master Set to 1/15
Figure 14. Master Set to 14/15
Figure 15. Master Set to 15/15
Figure 16. Individual (or Global) Set to 1/16
Figure 17. Individual (or Global) Set to 15/16
Figure 18. Individual (or Global) Set to 16/16
14 15
.
14
.
14
15
15
Intensity Control and Hot-Insertion Protection
1
1
1
2
2
2
3
3
3
Applications Information
1
4
1
1
4
4
______________________________________________________________________________________
2
5
2
2
5
5
3
6
3
3
6
6
4
7
4
4
7
7
MASTER INTENSITY TIMESLOT
MASTER INTENSITY TIMESLOT
5
8
8
5
5
8
9 10 11 12 13 14 15
6
9
9
6
6
10
10
7
7
7
11
11
8
8
8
12
12
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
Hot Insertion
13
13
17-Output LED Driver/GPO with
14
14
MASTER INTENSITY TIMESLOT CONTROL IS IGNORED
15
15
1
1
1
2
2
2
.
.
.
1
1
1
up to 8V asserted on them. The MAX6964 can therefore
be used in hot-swap applications.
The open-drain output architecture allows the ports to
level translate the outputs to higher or lower voltages
than the MAX6964 supply. An external pullup resistor
can be used on any output to convert the high-imped-
ance logic-high condition to a positive voltage level.
The resistor can be connected to any voltage up to 7V.
For interfacing CMOS inputs, a pullup resistor value of
220kΩ is a good starting point. Use a lower resistance
to improve noise immunity, in applications where power
consumption is less critical, or where a faster rise time
is needed for a given capacitive load.
When driving LEDs, a resistor in series with the LED
must be used to limit the LED current to no more than
50mA. Choose the resistor value according to the fol-
lowing formula:
where:
R
LED (Ω).
V
V
V
sinking I
I
LED
2
SUPPLY
LED
OL
LED
2
2
3
3
3
is the desired operating current of the LED (A).
is the output low voltage of the MAX6964 when
is the forward voltage of the LED (V).
is the resistance of the resistor in series with the
4
4
4
LED
R
is the supply voltage used to drive the LED (V).
5
5
5
NEXT MASTER INTENSITY TIMESLOT
NEXT MASTER INTENSITY TIMESLOT
LED
6
(V).
6
6
7
= (V
7
7
8
8
8
SUPPLY
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
Output Level Translation
- V
LED
Driving LED Loads
- V
OL
) / I
LED
15