LM3530UME-40/NOPB National Semiconductor, LM3530UME-40/NOPB Datasheet - Page 27

• Manufacturer Part Number: LM3530UME-40/NOPB
• Description: IC LED DRVR PROGRAM I2C 12USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3530UME-40/NOPB

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 500kHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 12-UFBGA
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: Adjustable
• Led Driver Application: LED Backlighting, Portable Electronics
• No. Of Outputs: 1
• Output Current: 29.5mA
• Output Voltage: 40V
• Input Voltage: 2.7V To 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3530UME-40TR

Register Descriptions
*Note: Unused bits in the LM3530's Registers default to a logic '1'.
Register Name
General
Configuration
ALS Configuration
Brightness Ramp
Rate
ALS Zone
Information
ALS Resistor
Select
Brightness Control
(BRT)
Zone Boundary 0
(ZB0)
Zone Boundary 1
(ZB1)
Zone Boundary 2
(ZB2)
Zone Boundary 3
(ZB3)
Zone Target 0
(Z0T)
Zone Target 1
(Z1T)
Zone Target 2
(Z2T)
Zone Target 3
(Z3T)
Zone Target 4
(Z4T)
Function
1. Simple Interface Enable
2. PWM Polarity
3. PWM enable
4. Full-Scale Current Selection
5. Brightness Mapping Mode Select
6. I
1. ALS Current Control Enable
2. ALS Input Enable
3. ALS Input Select
4. ALS Averaging Times
Programs the rate of rise and fall of the LED current
1. Zone Boundary Change Flag
2. Zone Brightness Information
Internal ALS1 and ALS2 Resistances
Holds the 7 bit Brightness Data
ALS Zone Boundary #0
ALS Zone Boundary #1
ALS Zone Boundary #2
ALS Zone Boundary #3
Zone 0 LED Current Data. The LED Current Source transitions to the
brightness code in Z0T when the ALS_ input is less than the zone
boundary programmed in ZB0.
Zone 1 LED Current Data. The LED Current Source transitions to the
brightness code in Z1T when the ALS_ input is between the zone
boundaries programmed in ZB1 and ZB0.
Zone 2 LED Current Data. The LED Current Source transitions to the
brightness code in Z2T when the ALS_ input is between the zone
boundaries programmed in ZB2 and ZB1.
Zone 3 LED Current Data. The LED Current Source transitions to the
brightness code in Z3T when the ALS_ input is between the zone
boundaries programmed in ZB3 and ZB2.
Zone 4 LED Current Data. The LED Current Source transitions to the
brightness code in Z4T when the ALS_ input is between the zone
boundaries programmed in ZB4 and ZB3.
2
C Device Enable
TABLE 4. LM3530 Register Definition
27
Address
0xA0
0x10
0x20
0x30
0x40
0x41
0x60
0x61
0x62
0x63
0x70
0x71
0x72
0x73
0x74
POR Value
0xCC
0xB0
0x2C
0x4C
0x00
0x00
0x00
0x7F
0x33
0x66
0x99
0x19
0x33
0x66
0x7F
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