NCP1840Q8A6MNG ON Semiconductor, NCP1840Q8A6MNG Datasheet - Page 16

• 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

Step 4a. Set LEDs 1, 2, 3, 4, 8 to be ON and immediately activate the change with settings loaded in Steps 1−3.
Note: After this step the LEDs will immediately be activated with the current level and PWM duty cycle settings previously
loaded.
Step 4b. (Alternative to Step 4a.) Set LEDs 1, 2, 3, 4, 8 to be ON and later activate the change with settings loaded in Steps
1−3.
Note: After this step the LEDs will not be activated until either a 000 or 010 Control Bit setting is applied − see further 4b steps.
Note: After this step the LEDs will immediately be activated with the current level and PWM duty cycle settings previously
loaded.
Step 5. Turn OFF LED8, leaving LEDs 1, 2, 3, 4 ON.
4a.1 Set the Part Address to 1B (hex).
4a.2 Set the Read/Write bit to 0.
4a.3 Set the Control Bits to 010 and set the Register address to 10 (hex) to write to the Output Control Register.
4a.4 Set the Data to 8F (hex), which will set LEDs 1, 2, 3, 4, 8 to be ON.
4b.1 Set the Part Address to 1B (hex).
4b.2 Set the Read/Write bit to 0.
4b.3 Set the Control Bits to 001 and set the Register address to 10 (hex) to write to the Output Control Register.
4b.4 Set the Data to 8F (hex), which will set LEDs 1, 2, 3, 4, 8 to be ON.
4b.5 Set the Part Address to 1B (hex).
4b.6 Set the Read/Write bit to 0.
4b.7 Set the Control Bits to 000.
5.1 Set the Part Address to 1B (hex).
5.2 Set the Read/Write bit to 0.
5.3 Set the Control Bits to 010 and set the Register address to 10 (hex) to write to the Output Control Register.
5.4 Set the Data to 0F (hex), which will set LED8 OFF and leave LEDs 1, 2, 3, 4 ON.
Start
Start
Start
Start
S
S
S
S
Part Address
Part Address
Part Address
Part Address
0011011
0011011
0011011
0011011
R/W
R/W
R/W
R/W
0
0
0
0
Ack
Ack
Ack
Ack
A
A
A
A
Control
Control
Control
Control
010
001
000
010
Bits
Bits
Bits
Bits
http://onsemi.com
Register Address
Register Address
Register Address
16
10000
10000
10000
Register Address
Don’t Care
Ack
Ack
Ack
A
A
A
Register Data
Register Data
Register Data
10001111
10001111
00001111
Ack
A
Ack
A
Ack
Ack
A
A
Stop
P
Stop
Stop
Stop
P
P
P