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LP55231 数据表(PDF) 6 Page - Texas Instruments

部件名 LP55231
功能描述  LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump - WQFN
PDF  59 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

LP55231 数据表(HTML) 6 Page - Texas Instruments

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LP55231
SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016
www.ti.com
Product Folder Links: LP55231
Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
(1)
Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
(2)
Output Current Accuracy is the difference between the actual value of the output current and programmed value of this current.
Matching is the maximum difference from the average. For the constant current outputs on the part (D1 to D9), the following are
determined: the maximum output current (MAX), the minimum output current (MIN), and the average output current of all outputs (AVG).
Two matching numbers are calculated: (MAX-AVG)/AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is
considered the matching figure. Note that some manufacturers have different definitions in use.
(3)
Saturation voltage is defined as the voltage when the LED current has dropped 10% from the value measured at VOUT – 1 V.
6.7 LED Driver Electrical Characteristics
Typical (TYP) values apply for TA = 25°C and minimum (MIN) and maximum (MAX) apply over the operating ambient
temperature range (
−30°C < TA < 85°C). Specifications apply to the LP55231 Functional Block Diagram with: VDD = 3.6 V, VEN
= 1.65 V, COUT = 1 µF, CIN = 1 µF, C1–2 = 0.47 µF, unless otherwise specified.
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ILEAKAGE
Leakage current (outputs D1 to D9)
PWM = 0%
0.1
1
µA
IMAX
Maximum source current
Outputs D1 to D9
25.5
mA
IOUT
Output current accuracy(2)
Output current set to 17.5 mA
−4%
4%
Output current set to 17.5 mA, TA = 25°C
–5%
5%
IMATCH
Matching(2)
Output current set to 17.5 mA, TA = 25°C
1%
2.5%
ƒLED
LED switching frequency
312
Hz
VSAT
Saturation voltage(3)
Output current set to 17.5 mA
TA = 25°C
45
100
mV
(1)
Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
(2)
Total unadjusted error includes offset, full-scale, and linearity errors.
6.8 LED Test Electrical Characteristics
Typical (TYP) values apply for TA = 25°C and minimum (MIN) and maximum (MAX) apply over the operating ambient
temperature range (
−30°C < TA < 85°C). Specifications apply to the LP55231 Functional Block Diagram with: VDD = 3.6 V,
VEN = 1.65 V, COUT = 1 µF, CIN = 1 µF, C1–2 = 0.47 µF, unless otherwise specified.
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LSB
Least significant bit
30
mV
EABS
Total unadjusted error(2)
VIN_TEST = 0 V to VDD, TA = 25°C
< ±3
±4
LSB
tCONV
Conversion time
2.7
ms
VIN_TEST
DC voltage range
TA = 25°C
0
5
V
(1)
Low-ESR surface-mount ceramic capacitors (MLCCs) used in setting electrical characteristics.
(2)
The I2C host should allow at least 500 μs before sending data to the LP55231 after the rising edge of the enable line.
6.9 Logic Interface Characteristics
Typical (TYP) values apply for TA = 25°C and minimum (MIN) and maximum (MAX) apply over the operating ambient
temperature range (
−30°C < TA < 85°C). Specifications apply to the LP55231 Functional Block Diagram with: VDD = 3.6 V, VEN
= 1.65 V, COUT = 1 µF, CIN = 1 µF, C1–2 = 0.47 µF, unless otherwise specified.
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LOGIC INPUT EN
VIL
Input low level
0.5
V
VIH
Input high level
1.2
V
II
Input current
–1
1
µA
tDELAY
Input delay(2)
2
µs
LOGIC INPUT SCL, SDA, TRIG, CLK, ASEL0, ASEL1
VIL
Input low level
0.2 × VEN
V
VIH
Input high level
0.8 × VEN
V
II
Input current
–1
1
µA
LOGIC OUTPUT SDA, TRIG, INT
VOL
Output low level
IOUT = 3 mA (pullup current)
0.3
0.5
V
IL
Output leakage current
VOUT = 2.8 V
1
µA



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