ILD4071 Datasheet, PDF (10/25 Pages) Infineon Technologies AG – LED Driver for High Power LEDs

ILD4071
Electrical Characteristics
5
Electrical Characteristics
All parameters have been tested at 25°C, unless otherwise specified.
5.1
General Parameters
Electrical Characteristics: Buck Regulator
V_REC = 24 V, T_j = -40 °C to +125 °C, all voltages with respect to ground (unless otherwise specified)
Pos. Parameter
Symbol
Limit Values Unit Conditions
Min. Typ. Max.
5.1.1 Voltage Drop over Power
Transistor
V_Drop,100
–
0.8 –
V
I_peak=100mA
5.1.2 Voltage Drop over Power
Transistor
V_Drop,700
–
1.4 –
V
I_peak=700mA
5.1.3 Freewheeling diode forward
voltage
V_fw,100
–
0.8 –
V
I_peak=100mA
5.1.4 Freewheeling diode forward
voltage
V_fw,700
–
1.4 –
V
I_peak=700mA
5.1.5
5.1.6
Peak over current limit
Peak current accuracy
5.1.7 Input under voltage shutdown
threshold
I_{peak_lim}
I_{peak_acc}
–
1.4 –
450 500 550
V_REC,UVOFF –
–
5
A–
mA V_REC = 12V
V_EN = 5V
V_LED = 7.2V
R_SET = 14kΩ
L_SW = 220µH
f_SW = 200kHz
V
V_EN = 5V
V_REC decreasing; see
Figure 3
5.1.8 Input voltage startup threshold
V_REC,UVON –
–
6
V
V_EN = 5V
V_REC increasing; see
Figure 3
5.1.9 Input over voltage shutdown
threshold
V_REC,OVOFF 40.5 –
–
V
V_EN = 5V
V_REC increasing; see
Figure 3
5.1.10 Input over voltage startup threshold V_REC,OV 40 –
–
V
V_EN = 5V
V_REC decreasing; see
Figure 3
5.1.11 Switch ON delay
t_dON
–
400
5.1.12 Switch OFF delay
t_dOFF
–
500
5.1.13 Reference Voltage at SET pin
V_SET
1.16 1.225
5.1.14 Pull up current for FREQ pin
I_FREQ
5
–
5.1.15 Oscillator switch off threshold
V_FREQ,HIGH –
3.2
5.1.16 Oscillator switch on threshold
V_FREQ,LOW –
1.2
1) The minimum switching ON time t_ON must be greater than t_dON + t_dOFF
600
850
1.29
–
–
–
ns ¹⁾–
ns ¹⁾–
V–
mA V_FREQ=0V
V–
V–
Datasheet
10
Rev. 1.0, 2011-11-16