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17-Output LED Driver/GPO with
Intensity Control and Hot-Insertion Protection
Table 10. PWM Intensity Settings (Blink Enabled)
EXAMPLES OF LED BLINK BEHAVIOR
OUTPUT
PWM DUTY CYCLE
OUTPUT BLINK
PWM DUTY CYCLE
OUTPUT BLINK
(LED IS ON WHEN OUTPUT IS LOW)
(OR
GLOBAL)
INTENSITY
PHASE X
REGISTER BIT = 0
PHASE X
REGISTER = 1
BLINK PHASE 0
REGISTER BIT = 0
BLINK PHASE 0
REGISTER BIT = 1
SETTING
LOW
HIGH
LOW
HIGH
BLINK PHASE 1
REGISTER BIT = 1
BLINK PHASE 1
REGISTER BIT = 0
TIME
TIME
TIME
TIME
0x0
0x1
0x2
1/16
2/16
3/16
15/16
14/16
13/16
15/16
14/16
13/16
1/16
2/16
3/16
0x3
0x4
0x5
0x6
4/16
5/16
6/16
7/16
12/16
11/16
10/16
9/16
12/16
11/16
10/16
9/16
4/16
5/16
6/16
7/16
Phase 0: LED on at low intensity
Phase 1: LED on at high intensity
Phase 0: LED on at high intensity
Phase 1: LED on at low intensity
0x7
0x8
0x9
0xA
8/16
9/16
10/16
11/16
8/16
7/16
6/16
5/16
8/16
7/16
6/16
5/16
8/16
9/16
10/16
11/16
Output is half intensity during both blink phases
0xB
0xC
0xD
0xE
12/16
13/16
14/16
15/16
4/16
3/16
2/16
1/16
4/16
3/16
2/16
1/16
12/16
13/16
14/16
15/16
Phase 0: LED on at high intensity
Phase 1: LED on at low intensity
Phase 0: LED on at low intensity
Phase 1: LED on at high intensity
0xF
Static low
Static low
Static high Static high
impedance impedance
Phase 0: LED on continuously
Phase 1: LED off continuously
Phase 0: LED off continuously
Phase 1: LED on continuously
Power-Supply Considerations
The MAX6964 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 the underside exposed pad
to GND.
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