LP5520 datasheet(5/46 Pages) TI1

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LP5520

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SNVS440B – MAY 2007 – REVISED MARCH 2016

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(1)

All voltages are with respect to the potential at the GND pins.

(2)

Minimum and maximum limits are specified by design, test or statistical analysis. Typical numbers represent the most likely norm.

(3)

Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.

6.5 Electrical Characteristics

Unless otherwise noted typical limits are for TJ = 25°C, minimum and maximum limits apply over the operating ambient

temperature range (–30°C < TJ < +85°C), and specifications apply to the LP5520 Functional Block Diagram with: CVDDA/D =

100 nF, COUT = 2 × 4.7 µF, 25 V, CIN= 10 µF, 6.3 V, L1 = 4.7 µH.

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IVDD

Standby supply current

(VDDA + VDDD)

NSTBY = L, VDDIO ≥ 1.65 V

1.7

µA

NSTBY = L , VDDIO = 0 V

No-boost supply current

(VDDA + VDDD)

NSTBY = H,

EN_BOOST = L

0.9

No-load supply current

(VDDA + VDDD)

NSTBY = H, EN_BOOST = H

AUTOLOAD = L

1.4

IVDDIO

VDDIO standby supply current

NSTBY = L

µA

VLDO

Internal LDO output voltage

VIN ≥ 2.9 V, TJ = 25°C

2.77

2.80

2.84

ILDO

Internal LDO output current

Current to external load

(1)

Matching is the maximum difference from the average when all outputs are set to same current.

(2)

Saturation voltage is defined as the voltage when the LED current has dropped 10% from the value measured at 2 V.

6.6 RGB Driver Electrical Characteristics (ROUT, GOUT, BOUT Outputs)

Typical limits are for TJ = 25°C, minimum and maximum limits apply over the operating ambient temperature range

(–30°C < TJ < +85°C); over operating free-air temperature range (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ILEAKAGE

ROUT, GOUT, BOUT pin

leakage current

0.1

µA

IMAX

Maximum sink current

Outputs ROUT, GOUT, BOUT control = 255

(FFH)

Current accuracy of ROUT,

GOUT, and BOUT

Output current set to 20 mA

–5%

Output current set to 60 mA

–10%

10%

IMATCH

Matching(1)

Between ROUT, GOUT, BOUT at 20 mA current

±0.2%

±2%

tPWM

PWM cycle time

Accuracy proportional to internal clock frequency

820

µs

ƒRGB

RGB switching frequency

<pwm_fast> = 0

1.22

kHz

<pwm_fast> = 1

19.52

VSAT

Saturation voltage(2)

I(LED) = 60 mA

550

ƒMAX

External PWM maximum

frequency

I(LED) = 60 mA, TJ = 25°C

MHz

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