STEVAL-ILD002V1 STMicroelectronics, STEVAL-ILD002V1 Datasheet - Page 2

• Manufacturer Part Number: STEVAL-ILD002V1
• Description: BOARD EVAL BASED ON L6574
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ILD002V1

• Main Purpose: Lighting, Ballast Control
• Embedded: No
• Utilized Ic / Part: L6574
• Primary Attributes: 20 W (3U T3 Lamp), 180 ~ 264 VAC, Dimmable
• Secondary Attributes: Preheating Ignition
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STEVAL-ILD002V1

PIN DESCRIPTION
L6574
PIN CONNECTION (top view)
THERMAL DATA
2/10
Symbol
R
N°
th j-amb
1
2
3
4
5
6
7
8
CPRE
RPRE
OPout
OPin+
RIGN
OPin-
EN1
Thermal Resistance Junction to ambient
Pin
CF
Preheat Timing Capacitor. The capacitor C
according to the relations: t
0.15s/ F). This feature is obtained by charging CPRE with two different currents. During tPRE
this current is independent of the external components, so CPRE is charged up to 3.5V (preheat
timing comparator threshold). During t
ence between f
at pin 1 is 5V.
Maximum Oscillation Frequency Setting. The resistance connected between this pin and ground
sets the fPRE value, fixing the difference between f
Start-up procedure, the effect current drown from R
V
Oscillator Frequency Setting. The capacitor C
In normal operation this pin shows a triangular wave.
Minimum Oscillation Frequency Setting. The resistance connected between this pin and ground
sets the f
Out of the operational amplifier. To implement a feedback control loop this pin can be connected
to the RIGN pin by means an appropriate circuitry.
Inverting Input of the operational amplifier.
Non Inverting Input of the operational amplifier.
Enable 1. This pin (active high), forces the device in a latched shutdown state (like in the under
voltage conditions). There are two ways to resume normal operation:
– the first is to reduce the supply voltage below the undervoltage threshold and then
– the second is activating EN2 input.
The enable 1 is especially designed for strong fault (e.g. in case of lamp disconnection).
REF
increase it again until the valid supply is recognised.
=2V.
IGN
OPOUT
value. The voltage at this pin is fixed at V
OPIN+
CPRE
RPRE
OPIN-
RING
PRE
EN1
CF
Parameter
and f
IGN
PRE
1
2
3
4
5
6
7
8
). In this way t
= K
D97IN492
PRE
SH
· C
the current depends on R
SH
PRE
PRE
16
15
14
13
12
11
10
Function
9
is always set at 0.1t
F
, along with to R
and t
sets the preheating and the frequency shift time,
Max.
PRE
SH
PRE
VBOOT
HVG
OUT
N.C.
V
LVG
GND
EN2
REF
S
= K
is over. The voltage at this pin is fixed at
and f
=2V.
FS
· C
IGN
DIP16
PRE
80
PRE
PRE
(f
PRE
and R
PRE
. In steady state the voltage
(typ. K
> f
value (i.e. on the differ-
IGN
IGN
SO16N
PRE
, sets f
). At the end of the
120
= 1.5s/ F, K
PRE
and f
°C/W
Unit
FS
ING
=
.