NCP1840Q8A6MNG ON Semiconductor, NCP1840Q8A6MNG Datasheet - Page 12

• Manufacturer Part Number: NCP1840Q8A6MNG
• Description: LED Lighting Drivers PRGRM MULTI LED DRIVER
• Manufacturer: ON Semiconductor

Specifications of NCP1840Q8A6MNG

• Product Category: LED Lighting Drivers
• Rohs: yes
• Input Voltage: 3 V to 5.5 V
• Operating Frequency: 400 kHz
• Maximum Supply Current: 0.75 mA
• Output Current: 30 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-20
• Minimum Operating Temperature: - 40 C

PWM Registers
NCP1840 can be individually programmed by loading the
appropriate data into the PWM Register for each channel.
There are 64 different duty cycle settings per channel that are
implemented in a linear fashion from 0%, fully OFF, to
CURRENT LEVEL REGISTER DESCRIPTION
PWM REGISTER DESCRIPTION
The PWM duty cycle of each of the 8 channels on the
D7
D7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D6
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D5
D5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Data − Binary
Data − Binary
D4
D4
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
D3
D3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
D2
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
D1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
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D0
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
12
100%, fully ON. A description of the 64 different PWM duty
cycle settings can be found in the following table. Note that
the typical on time of the LED can be calculated by
multiplying the duty cycle percentage by the typical PWM
period of 575 ms.
Data − Hex
Data − Hex
Data − Hex
1A
1B
1C
1D
1E
1F
0A
0B
0C
0D
0E
0F
18
19
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
Percentage of Maximum Current
Percentage of Maximum Current
PWM Duty Cycle
100.0000%
44.6667%
50.2333%
56.2333%
63.1000%
70.8000%
79.4333%
89.1333%
12.698%
14.286%
15.873%
17.460%
19.048%
20.635%
22.222%
23.810%
25.397%
26.984%
28.571%
30.159%
31.746%
33.333%
34.921%
11.111%
0.000%
1.587%
3.175%
4.762%
6.349%
7.937%
9.524%