Inductor construction, 1 boost inductor, 1 electrical specifications – Cirrus Logic CDB1610A-8W User Manual
Page 12
CDB1610A-8W
12
DS1011DB3
6. INDUCTOR CONSTRUCTION
The CDB1610A-8W includes a critical conduction mode (CRM) boost converter that provides power factor correction
and dimmer compatibility with a constant output current, quasi-resonant flyback stage. The following sections de-
scribe the boost and flyback inductors installed on the CDB1610A-8W.
6.1
Boost Inductor
The CS1610A uses an adaptive dimmer compatibility algorithm to control the boost inductor stage, which guaran-
tees dimmer compatibility operation plus enables flicker-free operation with leading-edge, trailing-edge, and digital
dimmers. The boost auxiliary winding is used for zero-current detection (ZCD) and supplies power to the CS1610A.
Figure 7. Boost Inductor Schematic
6.1.1
Electrical Specifications
Characteristics conditions:
• Operating temperature range: -25 °C to +120 °C (including coil heat)
Notes:
1.
Measured across pins 1 and 2
2.
Measured across pins 5 and 4
Parameter
Condition
Symbol
Min
Typ
Max
Unit
Boost Inductor
Primary Inductance
(Note 1)
f
resonant
=10kHz, 0.3V at 20°C
L
P
1.305
1.45
1.595
mH
Primary DC Resistance
(Note 1)
t
DCR
=20°C
3.28
4.1
4.92
Auxiliary DC Resistance
(Note 2)
t
DCR
=20°C
0.456
0.57
0.684
2
1
5
4
400T
#37AWG
(0.12mm)
22T
#37 AWG
(0.12 mm)
Primary
Auxillary