MAX6965AEE+ Maxim Integrated Products, MAX6965AEE+ Datasheet - Page 15

• Manufacturer Part Number: MAX6965AEE+
• Description: IC LED DRIVER LINEAR 16-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Linear (I²C Interface)r

Specifications of MAX6965AEE+

• Topology: Open Drain, PWM
• Number Of Outputs: 9
• 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: 16-QSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 50mA
• Internal Switch(s): Yes
• Number Of Segments: 6
• Operating Supply Voltage: 2 V to 3.6 V
• Maximum Supply Current: 110 uA
• Maximum Power Dissipation: 666 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

The 4 bits used for output O8’s PWM individual intensity
setting also double as the global intensity control
(Table 11). Global intensity simplifies the PWM settings
when the application requires them all to be the same,
such as for backlight applications, by replacing the
nine individual settings with one setting. Global intensi-
ty is enabled with the global intensity flag G in the con-
figuration register (Table 4). When global PWM control
is used, the 4 bits of master intensity and 4 bits of O8
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).
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 15
14 15
.
1
1
1
2
2
2
9-Output LED Driver with Intensity Control
3
3
3
1
4
1
1
4
4
______________________________________________________________________________________
2
5
2
2
5
5
3
6
6
3
3
6
4
7
Global/O8 Intensity Control
7
4
4
7
MASTER INTENSITY TIMESLOT
MASTER INTENSITY TIMESLOT
5
8
8
5
5
8
9 10 11 12 13 14 15
6
9 10 11 12 13 14 15
6
6
9 10 11 12 13 14 15
7
7
7
8
8
8
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
MASTER INTENSITY TIMESLOT CONTROL IS IGNORED
and Hot-Insertion Protection
1
1
1
2
2
2
.
.
.
1
1
1
The RST input, BLINK input, and serial interface SDA,
SCL, AD0 remain high impedance with up to 6V assert-
ed on them when the MAX6965 is powered down (V+ =
0V). Output ports O0–O8 remain high impedance with
up to 8V asserted on them. The MAX6965 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 MAX6965 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).
2
LED
2
2
3
3
3
is the resistance of the resistor in series with the
4
4
4
R
5
5
5
NEXT MASTER INTENSITY TIMESLOT
NEXT MASTER INTENSITY TIMESLOT
LED
6
6
6
7
= (V
7
7
Applications Information
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
Hot Insertion
) / I
LED
15