STP2CMPQTR datasheet(9/23 Pages) STMICROELECTRONICS

No de pièce	STP2CMPQTR

Description	Low voltage 2-channel constant current LED driver with charge pump

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STP2CMP

Electrical characteristics

DocID022734 Rev 2

9/23

4

Electrical characteristics

VCC = 3.3 V, VEN = VON1 = VON2 = VCC, VCP-SEL = VCC, RSET1 = RSET2 = 649 Ω, C1 = 1 µF,

typical values are at TA = 25 °C unless otherwise specified.

Table 7: Electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VCC

Supply voltage

2.7

5.5

V

Vcp_clamp

Charge pump

clamp voltage

2.7 V = < VCC < 3.1 V;

VCP_SEL = VCC; IOUT ≤ 40 mA

5

V

VCC > 3.1 V;

VCP_SEL = VCC; IOUT ≤ 120 mA

5

Tcp_start

Charge pump

start-up time

From CP_SEL low to high transition

to CP reaches steady-state 5 V

10

ms

ILED1,2

LED sink current

for each channel

Rsetx = 649 Ω at VLEDx= 0.9 V;

VCC ≥ 3.1 V

27.9

30

32.1

mA

Rsetx = 7.87 kΩ at VLEDx= 0.9 V;

VCC ≥ 3.1 V

2.33

2.5

2.68

mA

∆ILED

Output current

error between

each channel

RSET1 = RSET2,TA = 25 °C

±1

±4

%

VIH

High level input

voltage

2.0

V

VIL

Low level input

voltage

0.8

ICC

Supply operating

current

VON1 = VON2 = GND; no-load;

VCC = 5.5 V (charge pump

disabled); VCP_SEL = GND,

RSET1 = RSET2 = 7.87 kΩ

3.6

mA

VON1 = VON2 = GND; no-load;

VCC = 5.5 V (charge pump

disabled); VCP_SEL = GND,

RSET1 = RSET2 = 649 Ω

17

VON1 = VON2 = GND; no-load;

VCC = 3.3 V (charge pump enabled);

VCP_SEL = VCC,

RSET1 = RSET2 = 7.87 kΩ

4.0

VON1 = VON2 = GND; no-load;

VCC = 3.3 V (charge pump enabled);

VCP_SEL = VCC,

Rset1 = RSET2 = 649 Ω

17.2

ISHUTDOWN

Supply current

during power-

down

VEN = VON1 = VON2 = VCP_SEL = 0 V

1

5

µA

TSD

Thermal shutdown

150

°C

THS

Thermal shutdown

hysteresis

15

°C

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