Cirrus-logic CRD1610A-8W Manual de usuario descargar pdf (Pagina 14)

CRD1610A-8W

14 DS1012RD3

7. INDUCTOR CONSTRUCTION

The CRD1610A-8W includes a critical conduction mode (CRM) boost converter that provides power factor correc-

tion and dimmer compatibility with a constant output current, quasi-resonant flyback stage. The following sections

describe the boost and flyback inductors installed on the CRD1610A-8W.

7.1 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.

7.1.1 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)

resonant

=10kHz, 0.3V at 20°C

1.305 1.45 1.595 mH

Primary DC Resistance (Note 1)

DCR

=20°C

3.28 4.1 4.92 

Auxiliary DC Resistance (Note 2)

DCR

=20°C

0.456 0.57 0.684 

200T

#34AWG

(0.16mm)

22T

#34 AWG

(0.16mm)

Primary

Auxillary

Figure 10. Boost Inductor Schematic

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 23 24

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Cirrus-logic CRD1610A-8W Manual de usuario Pagina 14