ILD4180 Infineon Technologies, ILD4180 Datasheet - Page 9

• Manufacturer Part Number: ILD4180
• Description: LED Drivers MCREL 1.8A DC/DC
• Manufacturer: Infineon Technologies
• Type: Buckr

Specifications of ILD4180

• Packages: PG-DSO-8
• Vs (min): 4.75 V
• Vs (max): 45.0 V
• Iout (typ): 1,800.0 mA
• Iout (max): 1,800.0 mA
• Lead Free Status / Rohs Status: Details
• Other names: ILD4180XT

6
6.1
Enable Function: With the enable pin (EN) the device can be set in off-state reducing the current consumption to
typ. 0.1µA. The enable function features an integrated pull down resistor which ensures that the IC is shut down
and the power-switch is off in case the pin EN is not connected.
Device Wake Up Behavior: The device initialization is triggered either by the EN voltage level crossing the turn-
on threshold, rising supply voltage (during EN=H), and also when the device restarts after a thermal shutdown.
The softstart ramp starts after the BDS external capacitor is charged.
Overtemperature Behavior: The integrated thermal shutdown function turns the power-switch off in case of
overtemperature. The typ. junction shutdown temperature is 175°C, with a min. of 150°C. After cooling down the
IC will automatically restart operation. The thermal shutdown is an integrated protection function designed to
prevent IC destruction when operating under fault conditions. It must not be used for normal operation.
PWM Dimming Function: The PWMI signal directly controls the gate driver of the integrated power-switch by
overriding the internal control signals.
6.2
All parameters have been measured at 25°C, unless otherwise specified.
Electrical Characteristics: Enable, Bias and Thermal Shutdown
V
Pos.
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.2.10
6.2.11
6.2.12
6.2.13
6.2.14
1) Specified by design. Not subject to production test.
2) At startup current flowing in
Datasheet
S
= 24V,
Parameter
Current Consumption,
shut down mode
Current Consumption,
active mode
Current Consumption,
active mode
Enable high signal valid
Enable low signal valid
Enable hysteresis
Enable high input current
Enable low input current
PWMI high threshold
PWMI low threshold
PWMI turn-on delay
PWMI turn-off delay
Over temperature shutdown
Over temperature shutdown
hysteresis
T
j
= -40 ⋅C to +125 ⋅C, all voltages with respect to ground (unless otherwise specified)
Enable, Thermal Shutdown and PWM Dimming Function
Description
Electrical Characteristics Enable, Bias, Thermal Shutdown and PWM Dimming
C
BU1
, recommended max. PWM frequency 1kHz@370kHz
Symbol
I
I
I
V
V
V
I
I
V
V
t
t
T
T
PWM,ON
PWM,OFF
q,OFF
q,ON
q,ON
EN,hi
EN,lo
j,sd
j,sd_hyst
EN,hi
EN,lo
EN,HY
PWMI,hi
PWMI,lo
Min.
–
–
–
3
–
50
–
–
3
–
–
–
150
–
Enable, Thermal Shutdown and PWM Dimming Function
Limit Values
9
Typ.
0.1
–
–
–
–
200
–
0.1
–
–
–
–
175
15
400
190
–
Max.
2
7
10
–
0.8
30
1
–
0.8
5
5
Unit
µA
mA
mA
V
V
mV
µA
µA
V
V
µs
µs
°C
K
f
sw
Conditions
V
T
1)
V
V
V
V
1)
–
–
1)
V
V
–
–
2)
–
1)
1)
j
EN
EN
S
EN
S
EN
EN
< 105°C;
= 16V
= 16V
= 0.8V;
= 5.0V;
= 5.0V;
= 16V
= 0.5V
Rev. 1.1, 20011-01-25
V
I
I
CC
CC
S
= 16V
= 0mA;
= 1.8A;
ILD4180