MAX6965 Maxim Integrated Products, MAX6965 Datasheet - Page 17

• Manufacturer Part Number: MAX6965
• Description: 9-Output LED Driver
• Manufacturer: Maxim Integrated Products

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The MAX6965 must be protected from the negative
voltage transient generated when switching off induc-
tive loads, such as relays, by connecting a reverse-
biased diode across the inductive load (Figure 19). The
peak current through the diode is the inductive load’s
operating current.
Table 10. PWM Intensity Settings (Blink Enabled)
INTENSITY
GLOBAL)
SETTING
OUTPUT
(OR
0xC
0xD
0xA
0xB
0xE
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xF
CYCLE OUTPUT
BLINK PHASE X
9-Output LED Driver with Intensity Control
10/16
11/16
12/16
13/16
14/16
15/16
Static
LOW
TIME
1/16
2/16
3/16
4/16
5/16
6/16
7/16
8/16
9/16
low
PWM DUTY
REGISTER
BIT = 0
______________________________________________________________________________________
HIGH
15/16
14/16
13/16
12/16
11/16
10/16
Static
TIME
9/16
8/16
7/16
6/16
5/16
4/16
3/16
2/16
1/16
low
impedance
Static high
15/16
14/16
13/16
12/16
11/16
10/16
LOW
TIME
CYCLE OUTPUT
BLINK PHASE X
9/16
8/16
7/16
6/16
5/16
4/16
3/16
2/16
1/16
PWM DUTY
REGISTER
BIT = 1
impedance
Static high
HIGH
10/16
11/16
12/16
13/16
14/16
15/16
TIME
1/16
2/16
3/16
4/16
5/16
6/16
7/16
8/16
9/16
and Hot-Insertion Protection
B L I N K PH A SE 0 R EG IST ER B IT = 0
B L I N K PH A SE 1 R EG IST ER B IT = 1
P hase 0: LE D on at hi g h i ntensi ty
P hase 1: LE D on at hi g h i ntensi ty
P hase 1: LE D on at l ow i ntensi ty
Phase 0: LED on continuously
Phase 1: LED off continuously
P hase 0: LE D on at l ow i ntensi ty
The MAX6965 operates with a power-supply voltage of
2V to 3.6V. Bypass the power supply to GND with at
least 0.047µF as close to the device as possible.
For the QFN version, connect to the underside exposed
pad to GND.
Output is half intensity during both blink phases
EXAMPLES OF LED BLINK BEHAVIOR
(LED IS ON WHEN OUTPUT IS LOW)
Power-Supply Considerations
B L I N K PH A SE 0 R EG IST ER B IT = 1
B L I N K PH A SE 1 R EG IST ER B IT = 0
P hase 0: LE D on at hi g h i ntensi ty
P hase 1: LE D on at l ow i ntensi ty
P hase 1: LE D on at hi g h i ntensi ty
Phase 0: LED off continuously
Phase 1: LED on continuously
P hase 0: LE D on at l ow i ntensi ty
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