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CY8CLED03G01 Datasheet(PDF) 9 Page - Cypress Semiconductor |
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CY8CLED03G01 Datasheet(HTML) 9 Page - Cypress Semiconductor |
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9 / 55 page  CY8CLED04D01, CY8CLED04D02, CY8CLED04G01 CY8CLED03D01, CY8CLED03D02, CY8CLED03G01 CY8CLED02D01, CY8CLED01D01 Document Number: 001-46319 Rev. *N Page 9 of 55 4. PowerPSoC® Functional Overview 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. All PowerPSoC family devices are designed to replace traditional MCUs, system ICs, and the numerous discrete components that surround them. PowerPSoC devices feature high performance power electronics including 1 ampere 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 applications. This architecture integrates programmable analog and digital blocks to enable you to create customized peripheral configurations that match the requirements of each individual application. Additionally, the device includes a 24 MHz CPU, Flash program memory, SRAM data memory, and configurable I/O in a range of convenient pinouts and packages. 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 amplifiers, 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. 5. Power Peripherals PowerPSoC is designed to operate at voltages from 7 V to 32 V, drive up to 1 ampere of current using internal MOSFET switches, and over 1 ampere with external MOSFETs. This family of devices (CY8CLED0xD/G0y) combines up to four independent channels of constant current drivers. These drivers feature hysteretic controllers with the Programmable System-on-Chip (PSoC) that contains an 8-bit microcontroller, configurable digital and analog peripherals, and embedded flash memory. The CY8CLED0xD/G0y 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 CY8CLED0xD/G0y include up to four 32 volt power MOSFETs with current ratings up to 1 ampere 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, floating load buck-boost, and boost configurations. 5.1 Hysteretic Controllers The PowerPSoC contains four hysteretic controllers. There is one hysteretic controller for each channel of the device. 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: ■ Four independent channels ■ DAC configurable thresholds ■ Wide switching frequency range from 20 kHz to 2 MHz ■ Programmable minimum on and off time ■ Floating load buck, floating load buck-boost and boost topology controller The reference inputs (REF_A and REF_B in Figure 5-1.) of the hysteretic controller are provided by the reference DACs as illustrated in the top level block diagram (see Figure 3-1. on page 3). 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 5-1. The output current waveforms are shown in Figure 5-2. The hysteretic controller also controls the minimum on-time and off-time. This circuit prevents oscillation at very high frequencies; which can be very destructive to output switches. The output to the gate drivers is gated by the Trip, DIM and Enable signals. The Enable signal is a direct result of the enable bit in the control register for the hysteretic controller. The Trip signal can be any digital signal that follows TTL logic (logic high and logic low). It is an active high input. The DIM Modulation signal is the output of the dedicated modulators that are present in the power peripherals, or any other digital modulation signal. Figure 5-1. Generating Hysteretic Control Function Output REF_B REF_A IFB Lower Limit Comparator Upper Limit Comparator Min ON Timer Min Off Timer S R Q CSA FN0[x] Hyst Out DIM Modulation Enable Trip Function [+] Feedback |
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