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PDF ICL8105 Data sheet ( Hoja de datos )
| Número de pieza | ICL8105 | |
| Descripción | Digital Flyback Controller IC | |
| Fabricantes | Infineon | |
| Logotipo |  |
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ICL8105 - Digital Flyback Controller IC
XDP™ digital power
Datasheet
About this document
Scope and purpose
This document contains information about Infineon high-performance single-stage digital flyback controller
ICL8105 for LED lighting applications. Features and electrical characteristics are listed and explained.
Intended audience
This document is intended for customers wishing to design high-performance single-stage digital flyback AC-
DC converters for LED lighting based on the ICL8105 controller
2016-08-01
1
Rev. 2.0
1 page  
ICL8105 - Digital Flyback Controller IC
Datasheet
85 ... 305 V AC
VCC
HV
Internal
temperature
sensor
Startup cell
control
ICL8105
Zero crossing
detection
ZCD
PWM
GD
Square wave
generator
Dimming /
UART
Current
sensing
CS
Primary side
Micro-controller
SQW
PWM
Dimming
signal
RC Low
Pass Filter
DIM/UART
GND
Figure 1
Parameters
Configuration
Typical application 1 (Primary side micro-controller dimming)
Output
85 ... 305 V AC
Output
VCC
HV
Internal
temperature
sensor
Startup cell
control
ICL8105
Zero crossing
detection
ZCD
PWM
GD
Square wave
generator
SQW
Dimming /
UART
Current
sensing
CS
DIM/UART
GND
Parameters
Configuration
Figure 2 Typical application 2 (Secondary side 0-10V dimming)
Datasheet
5
Isolated Dimming
Circuit with CDM10V
Digital to
Analog
conversion
Vcc
Iout CDM10V Rdim+
0 – 10 V
input
Rev. 2.0
2016-08-01
5 Page 
ICL8105 - Digital Flyback Controller IC
Datasheet
Functional description
Figure 8 Overview of operation modes
2.2.3 Power factor correction (PFC)
The gate driver GD is used for driving the power MOSFET of the flyback. Constant output current regulation
and a sinusoidally shaped input current are achieved by on-time control. The quasi-constant on-time ton
ensures high PF and low THD performance. The internal control signal ton is calculated by the digital engine so
that the output current is close to the target current (Chapter 2.2.2).
Optionally, an enhanced PFC (EPFC) scheme can be enabled to compensate the input current distortion
caused by the EMI filter1). In this scheme, the on-time is a function of the internal controller signal ton, the input
voltage Vin, output voltage Vout, output current Iout, phase angle and a configurable gain parameter (C_EMI)
optimizing the input current waveform (Chapter 2.4).
2.2.4 Dimming via pin DIM/UART
The voltage sensed at pin DIM/UART is used to determine the output current level. Figure 9 shows the relation
of DIM/UART voltage to the output current target value. Levels of V_DIM_min and V_DIM_max2) ensure that
minimum current I_out_dim_min and maximum current I_out_set can always be achieved, making the application
robust against dimmer and other component tolerances. The sampled voltage VDIM at pin DIM/UART is digitally
filtered to stabilize light output. The ICL8105 can also be configured to use a linear or a quadratic dimming
curve.
Figure 9 Dimming curves for pin DIM/UART
1) Patent pending
2) fixed at 1.72V
Datasheet
11
Rev. 2.0
2016-08-01
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ICL8105.PDF ] | |
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