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LP3952RL/NOPB Datasheet(PDF) 8 Page - Texas Instruments

Part # LP3952RL/NOPB
Description  6-Channel Color LED Driver with Audio Synchronization
PDF  46 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP3952RL/NOPB Datasheet(HTML) 8 Page - Texas Instruments

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LP3952
SNVS518A – JULY 2007 – REVISED MARCH 2013
www.ti.com
Magnetic Boost DC/DC Converter Electrical Characteristics
Parameter
Test Conditions
Min
Typ
Max
Units
ILOAD
Load Current
3.0V
≤ VIN
0
300
VOUT = 5V
mA
3.0V
≤ VIN
0
400
VOUT = 4V
VOUT
Output Voltage Accuracy
3.0V
≤ VIN ≤ VOUT - 0.5
−5
+5
%
(FB Pin)
VOUT = 5.0V
Output Voltage
1 mA
≤ ILOAD ≤ 300 mA
VIN–V(SCHOTTKY)
V
(FB Pin)
VIN > 5V + V(SCHOTTKY)
RDSON
Switch ON Resistance
VDD1,2 = 2.8V, ISW = 0.5A
0.4
0.8
Ω
fboost
PWM Mode Switching
RT = 82 k
Ω
2
MHz
Frequency
freq_sel[2:0] = 1XX
Frequency Accuracy
2.7
≤ VDDA ≤ 2.9
−6
±3
+6
%
RT = 82 k
Ω
−9
+9
tPULSE
Switch Pulse Minimum
no load
25
ns
Width
tSTARTUP
Startup Time
Boost startup from STANDBY
10
ms
ISW_MAX
SW Pin Current Limit
700
800
900
mA
550
950
BOOST STANDBY MODE
User can stop the Boost Converter operation by writing the Enables register bit EN_BOOST low. When
EN_BOOST is written high, the converter starts for 10 ms in PFM mode and then goes to PWM mode.
BOOST OUTPUT VOLTAGE CONTROL
User can control the boost output voltage by boost output 8-bit register.
Boost Output [7:0]
Boost Output
Register 0DH
Voltage (typical)
Bin
Hex
0000 0000
00
4.00
0000 0001
01
4.25
0000 0011
03
4.40
0000 0111
07
4.55
0000 1111
0F
4.70
0001 1111
1F
4.85
0011 1111
3F
5.00 Default
0111 1111
7F
5.15
1111 1111
FF
5.30
8
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Copyright © 2007–2013, Texas Instruments Incorporated
Product Folder Links: LP3952



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