L99LD01 datasheet(51/69 Pages) STMICROELECTRONICS

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L99LD01

Electrical characteristics

VSP-VSN

Differential input

voltage range

-0.3

0.5

GLA_CPK

Gain of internal linear

amplifier

VSP = 100 mV; VSN =0 V; Pin

SC floating

89.8

VLA_OFFS

Linear amplifier output

offset voltage

VSP =VSN = 0

150

350

VCL_31

Default internal

reference for the

current limiter(3)

Internal C.L. register = 31

3.5

(VSP-VSN)TH

Differential threshold

voltage for activate max

input current prot.

Internal C.L. register = 31;

VSC =5 V

300

350

400

VCL

Internal C.L. voltage

reference range

0.279 *

VCL_31

VCL_STEP

Internal C.L. voltage

reference step

(0.721 *

VCL_31 /

31)

Writing into 5 bit LED Current Register via SPI.

N is the number corresponding to the 5 bits of LED_CURR control register.

Settable by loading the 5 bit C.L. Register via SPI.

Table 24. ISENSE+, ISENSE- pin, and O.T.A. characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Units

Table 25. SC pin characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Units

VSC_low

Min ramp voltage at pin SC

ISC =0

0.2

0.45

VSC_HIGH

Max ramp voltage at pin SC

ISC = 0

1.4

2.6

RSC

Ext. resistor range

1000

Ω

Table 26. VLED pin characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Units

VLED

Operative input voltage range for OV

detection

LMODE =low

LMODE =high

VS+5

RVLED_PD

Pull down resistor

0.4

0.8

1.2

Ω

OV_TH1

LED overvoltage threshold 1

boost application

LMODE = low

3.4

3.5

3.6

OV_TH2

LED overvoltage threshold 2

boost application

LMODE = low

2.3

2.5

2.7

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