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MAX6965 Datasheet

  • MAX6965

  • 9路輸出LED驅(qū)動(dòng)器，帶有亮度控制和熱插入保護(hù)

  • 22頁(yè)

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19-3058; Rev 1; 2/04
9-Output LED Driver with Intensity Control
General Description
The MAX6965 I
2
C鈩?compatible serial interfaced periph-
eral provides microprocessors with nine additional out-
put ports. Each output is an open-drain current-sinking
output rated to 50mA at 7V. All outputs are capable of
driving LEDs, or providing logic outputs with external
resistive pullup up to 7V.
Eight-bit PWM current control is also integrated. Four of
the bits are global control and apply to all LED outputs
to provide coarse adjustment of current from fully off to
fully on with 14 intensity steps. Additionally each output
then has an individual 4-bit control, which further
divides the globally set current into 16 more steps.
Alternatively, the current control can be configured as a
single 8-bit control that sets all outputs at once.
Each output has independent blink timing with two blink
phases. LEDs can be individually set to be either on or off
during either blink phase, or to ignore the blink control.
The blink period is controlled by an external clock (up to
1kHz) on BLINK or by a register. The BLINK input can also
be used as a logic control to turn the LEDs on and off, or
as a general-purpose input (GPI).
The MAX6965 is controlled through a 2-wire I
2
C serial
interface, and can be configured to one of four I
2
C
addresses.
Features
鈾?/div>
400kbps, 2-Wire Serial Interface, 5.5V Tolerant
鈾?/div>
2V to 3.6V Operation
鈾?/div>
Overall 8-Bit PWM LED Intensity Control
Global 16-Step Intensity Control
Plus Individual 16-Step Intensity Controls
鈾?/div>
Two-Phase LED Blinking
鈾?/div>
High Port Output Current鈥擡ach Port 50mA (max)
鈾?/div>
RST
Input Clears Serial Interface and Restores
Power-Up Default State
鈾?/div>
Outputs are 7V-Rated Open Drain
鈾?/div>
Low Standby Current (1.2碌A(chǔ) (typ), 3.3碌A(chǔ) (max))
鈾?/div>
Tiny 3mm x 3mm, Thin QFN Package
鈾?/div>
-40擄C to +125擄C Temperature Range
MAX6965
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
16 Thin QFN
3mm x 3mm x 0.8mm
TOP
MARK
AAW
鈥?/div>
MAX6965ATE -40擄C to +125擄C
MAX6965AEE -40擄C to +125擄C 16 QSOP
Typical Application Circuit
3.3V
0.047碌F
7V
Applications
LCD Backlights
LED Status Indication
Keypad Backlights
RGB LED Drivers
Pin Configurations
碌C
V+
MAX6965
SDA
SCL
BLINK
RST
O0
O1
O2
O3
O4
O5
AD0
O6
O7
O8
GND
6V
RELAY
RELAY
RELAY
SDA
RST
V+
TOP VIEW
BLINK
SDA
SCL
I/O
I/O
16
15
14
13
AD0
O0
O1
O2
1
2
12 SCL
11 O8
MAX6965ATE
3
4
5
O3
6
GND
7
O4
8
O5
10 O7
9
O6
QFN
Pin Configurations continued at end of data sheet.
Purchase of I
2
C components of Maxim Integrated Products, Inc.,
or one of its sublicensed Associated Companies, conveys a
license under the Philips I
2
C Patent Rights to use these compo-
nents in an I
2
C system, provided that the system conforms to the
I
2
C Standard Specification as defined by Philips.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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