EVL6562A-LED STMicroelectronics, EVL6562A-LED Datasheet - Page 17
EVL6562A-LED
Manufacturer Part Number
EVL6562A-LED
Description
EVALUATION MODULE L6562A
Manufacturer
STMicroelectronics
Type
Power Factor Correctionr
Specifications of EVL6562A-LED
Current - Output / Channel
350mA
Outputs And Type
1, Non-Isolated
Features
Dimmable
Voltage - Input
48V
Utilized Ic / Part
L6562A
Input Voltage
48 V
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
L6562A
Other names
497-10420
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
AN2983
Going into further detail, we also have to consider the delay of the current sense comparator
(tdel) and modify
Equation 40
With:
Equation 41
Equation 42
Equation 43
And with
Equation 44
And
Equation 45
With the values of our application:
Equation 46
Equation 47
Equation 48
Equation 40
Equation 38
_ I
+
_ I
+
_ I
VLed
Led
VLed
Led
toff
Led
:
Equation 33
_
_
*
=
avg
_
*
avg
⎡
⎢
⎣
that now becomes:
⎡
⎢
⎣
avg
⎛
⎜
⎝
1.57
⎛
⎜
⎝
Rs
Rs
1
_ I
=
1
=
=
⎛
⎜
⎝
⎞
⎟
⎠
Led
⎛
⎜
⎝
⎞
⎟
⎠
⎛
⎜
⎝
Rs
*
μ
⎛
⎜
⎝
Rs
1
*
Rs
⎛
⎜
⎝
1
Rs
S,
L
1
⎛
⎜
⎝
as follows.
Doc ID 15679 Rev 1
Rb
Ra
1
_
⎞
⎟
⎠
2
Rb
Ra
⎛
⎜
⎝
_ I
⎞
⎟
⎠
⎞
⎟
⎠
*
Ra
Rb
tdel
( )
avg
⎞
⎟
⎠
*
toff
=
⎡
⎢
⎣
⎞
⎟
⎠
del
*
⎡
⎢
⎢
⎣
Vth
⎞
⎟
⎠
−
⎡
⎢
⎢
⎣
⎛
⎜
⎜
⎝
Vth
⎞
⎟
⎠
−
Vth
470
=
1
=
+
=
=
1
2
*
_ I
*
2
(
⎛
⎜
⎝
1
⎛
⎜
⎝
⎛
⎜
⎝
0.2
*
2
tdel
⎛
⎜
⎝
⎛
⎜
⎝
2
tdel
Ra
*
Led
toff
8 .
⎛
⎜
⎝
Ra
L
toff
10
L
⎛
⎜
⎝
Ra
L
Ra
/ L
)
μ
Ra
+
toff
−
⎞
⎟
⎠
⎞
⎟
⎠
Ra
=
_
+
S,
⎞
⎟
⎠
6
⎤
⎥
⎦
Rb
Rs
+
*
pk
Rb
(
−
−
⎞
⎟
⎟
⎠
(
Rb
. 0
Vin
L
⎛
⎜
⎝
=
VLed
⎞
⎟
⎠
⎞
⎟
⎠
985
−
⎞
⎟
⎠
tdel
−
+
(
=
⎞
⎟
⎠
. 1
L
−
1
−
⎛
⎜
⎝
−
Vin
470
68
2
Vin
/ L
VLed
*
Vin
⎞
⎟
⎠
_ I
tdel
*
10
⎤
⎥
⎦
*
*
⎛
⎜
⎝
Rs
rip
*
10
⎛
⎜
⎝
tdel
−
*
μ
⎡
⎢
⎣
Rb
Ra
L
6
⎛
⎜
⎝
⎡
⎢
⎣
)
⎞
⎟
⎠
+
−
H,
S )
⎛
⎜
⎝
Rb
Ra
4
Rb
Ra
_ I
⎞
⎟
⎠
⎞
⎟
⎠
)
S
⎤
⎥
⎦
Rs
⎞
⎟
⎠
del
+
⎞
⎟
⎠
−
Vin
−
⎛
⎜
⎝
=
⎛
⎜
⎝
/ L
tdel
/ L
2.8
*
tdel
Rs
⎛
⎜
⎝
Rs
Circuit description
tdel
L
⎞
⎟
⎠
Ω
⎤
⎥
⎦
⎞
⎟
⎠
⎤
⎥
⎥
⎦
⎤
⎥
⎦
⎞
⎟
⎠
⎤
⎥
⎥
⎦
+
+
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