CY8CLED04D01, CY8CLED04D02
CY8CLED04G01, CY8CLED03D01
CY8CLED03D02, CY8CLED03G01
CY8CLED02D01, CY8CLED01D01
®
■ Programmable minimum on and off time
3. PowerPSoC Functional Overview
■ Floating load buck, boost, and floating load buck-boost
topology controller
The
PowerPSoC
family
incorporates
programmable
system-on-chip technology with the best in class power
electronics controllers and switching devices to create easy to
use power-system-on-chip solutions for lighting applications.
The PowerPSoC contains four hysteretic controllers. There is
one hysteretic controller for each channel of the device. The
reference inputs of the hysteretic controller are provided by the
reference DACs as illustrated in the top level block diagram on
page 2 (see Figure 2-1).
All PowerPSoC family devices are designed to replace tradi-
tional MCUs, system ICs, and the numerous discrete compo-
nents that surround them. PowerPSoC devices feature high
performance power electronics including 1A 2 MHz power FETs,
hysteretic controllers, current sense amplifiers, and PrISM/PWM
modulators to create a complete power electronics solution for
LED power management. Configurable power, analog, digital,
and interconnect circuitry enables a high level of integration in a
host of industrial, commercial, and consumer LED lighting appli-
cations.
The hysteretic control function output is generated by comparing
the feedback value to two thresholds. Going below the lower
threshold turns the switch ON and exceeding the upper threshold
turns the switch OFF as shown in Figure 4-1 The output current
waveforms are shown in Figure 4-2.
Figure 4-1. Generating Hysteretic Control Function Output
Min ON
Timer
Lower Limit
Comparator
This architecture integrates programmable analog and digital
blocks to enable the user to create customized peripheral config-
urations that match the requirements of each individual appli-
cation. Additionally, the device includes a fast CPU, Flash
program memory, SRAM data memory, and configurable I/O in
a range of convenient pinouts and packages.
REF_A
S
R
Q
CSA
IFB
Upper Limit
Comparator
FN0.x
The PowerPSoC architecture, as illustrated in the block
diagrams, comprises five main areas: PSoC core, digital system,
analog system, system resources, and power peripherals which
include power FETs, hysteretic controllers, current sense ampli-
fiers, and PrISM/PWM modulators. Configurable global busing
combines all the device resources into a complete custom
system. The PowerPSoC family of devices have 10-port I/Os that
connect to the global digital and analog interconnects, providing
access to eight digital blocks and six analog blocks.
REF_B
Min Off
Timer
Hyst Out
DIM Modulation
Enable
Trip Function
4. Power Peripherals
The CY8CLED04D0X is the first product in the PowerPSoC
family to integrate power peripherals to add further integration for
your power electronics applications.The PowerPSoC family of
intelligent power controller ICs are used in lighting applications
that need traditional MCUs and discrete power electronics
support. The power peripherals of the CY8CLED04D0X include
four 32V power MOSFETs with current ratings up to 1A each. It
also integrates gate drivers that enable applications to drive
external MOSFETs for higher current and voltage capabilities.
The controller is a programmable threshold hysteretic controller,
with user-selectable feedback paths that uses the IC in current
mode floating load buck, boost, and floating load buck/boost
configurations.
Figure 4-2. Current Waveforms
ILED
REF_B
REF_A
ON
4.1 Hysteretic Controllers
DIM
OFF
The hysteretic controllers provide cycle by cycle switch control
with fast transient response which simplifies system design by
requiring no external compensation. The hysteretic controllers
include the following key features:
Hyst Out
■ Four independent channels
■ DAC configurable thresholds
The minimum on-time and off-time circuits in the PowerPSoC
prevent oscillations at very high frequencies, which can be very
destructive to output switches.
■ Wide switching frequency range from 20 kHz to 2 MHz
Document Number: 001-46319 Rev. *G
Page 8 of 52
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