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TLE4309

Adjustable Linear Low Dropout LED Driver

Infineon Technologies 

TLE4309

Table 5

Electrical Characteristics

VI = 13.5 V; VPWM ≥ VPWM,H; -25 °C < Tj < 125 °C;

all voltages with respect to ground; unless otherwise specified

Parameter

Symbol Limit Values Unit Test Condition

Min. Typ. Max.

Output

Output current

IQ

Output current limit

Dropout voltage

Reference

IQmax

Vdr

171 178 185 mA (VQ-VREF)1) = 6.6 V;

RREF = 1.0 Ω

438 456 474 mA (VQ-VREF)1) = 6.6 V;

RREF = 0.39 Ω

–

600 –

mA RREF = 0 Ω

–

0.35 0.7 V IQ = 300 mA

Reference Voltage VREF

Reference Voltage

Reference Input

Current

VREF

IREF

172 178 184 mV 0.39 < RREF < 1.0 Ω

Tj = 25 °C

171 178 185 mV 0.39 < RREF < 1.0 Ω

-1 0.1 1

µA VREF = 180 mV

Current Consumption

Current consumption Iq,OFF –

off mode

Current consumption Iq

–

PWM / ENABLE

0.1 2

12 22

µA PWM/EN = L,

Tj < 85 °C

mA VQ = 6.6 V; RREF = 0.47 Ω

PWM high level valid VPWM,H 2.6

PWM low level valid VPWM,L –

PWM input current IPWM,H –

high level

–

–

V–

–

0.7 V –

220 500 µA VPWM = 5.0 V

PWM input current IPWM,L -1

–

1

µA VPWM = 0.0 V

low level

Turn on delay time tPWM,ON 0

15 40 µs 70% of IQnom

Turn off delay time tPWM,OFF 0

15 40 µs 30% of IQnom

1) (VQ - VREF) equals the forward voltage sum of the connected LEDs, see figure 1.

Datasheet

6

Rev. 1.0, 2007-03-20

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