LM3530UME-40/NOPB National Semiconductor, LM3530UME-40/NOPB Datasheet - Page 28

• 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

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GENERAL CONFIGURATION REGISTER (GP)
The General Configuration Register (address 0x10) is de-
scribed in
ALS CONFIGURATION REGISTER
The ALS Configuration Register controls the Ambient Light
Sensing input functions and is described in
Table
Bit 7
(PWM Simple
Enable
0 = Simple
Interface at
PWM Input is
Disabled
1 = Simple
Interface at
PWM Input is
Enabled
6.
Figure 18
Bit 6
(PWM
Polarity)
0 = PWM
active high
1 = PWM
active low
and
Table
5.
TABLE 5. General Configuration Register Description (0x10)
Bit 5
(EN_PWM)
see Figure 8
0 = LED current
is not a function
of PWM duty
cycle
1 = LED current
is a function of
duty cycle
FIGURE 18. General Configuration Register
FIGURE 19. ALS Configuration Register
Figure 19
Bit 4
(Full-Scale
Current
Select)
000 = 5 mA full-scale current
001 = 8.5 mA full-scale current
010 = 12 mA full-scale current
011 = 15.5 mA full-scale current
100 = 19 mA full-scale current
101 = 22.5 mA full-scale current
110 = 26 mA full-scale current
111 = 29.5 mA full-scale current
and
28
Bit 3
(Full-Scale
Current
Select)
Bit 2
(Full-Scale
Current
Select)
Bit 1
(Mapping
Mode Select)
0 =
exponential
mapping
1 = linear
mapping
30086609
30086610
Bit 0
(I
Enable)
0 = Device
Disabled
1 = Device
Enabled
2
C Device