參數(shù)資料
型號(hào)： CY8CLED03D01-56LTXI
廠商： Cypress Semiconductor Corp
文件頁數(shù)： 2/55頁
文件大?。?/td> 0K
描述： IC POWERPSOC 3CH 1A 56VQFN
特色產(chǎn)品： PowerPSoC? Embedded Power Controller
標(biāo)準(zhǔn)包裝： 260
系列： PowerPSoC® CY8CLED
核心處理器： M8C
芯體尺寸： 8-位
速度： 24MHz
連通性： DALI，DMX512，I²C，IrDA，SPI，UART/USART
外圍設(shè)備： LED，LVD，POR，PWM，WDT
輸入/輸出數(shù)： 14
程序存儲(chǔ)器容量： 16KB（16K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.75 V ~ 5.25 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 56-VFQFN 裸露焊盤
包裝： 托盤
產(chǎn)品目錄頁面： 698 (CN2011-ZH PDF)
配用： 428-2882-ND - KIT STARTER POWERPSOC LIGHTING
428-2281-ND - KIT EVAL POWERPSOC LIGHTING
428-2270-ND - KIT STARTER DEMO LIGHTING
其它名稱： 428-2924
CY8CLED04D01, CY8CLED04D02, CY8CLED04G01
CY8CLED03D01, CY8CLED03D02, CY8CLED03G01
CY8CLED02D01, CY8CLED01D01
Document Number: 001-46319 Rev. *P
Page 10 of 55
Figure 5-2. Current Waveforms
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.
5.2 Low Side N-Channel FETs
The internal low side N-Channel FETs are designed to enhance
system integration. The low side N-Channel FETs include the
following key features:
■ Drive capability up to 1 A
■ Switching times of 20 ns (rise and fall times) to ensure high
efficiency (more than 90%)
■ Drain source voltage rating 32 V
■ Low RDS(ON) to ensure high efficiency
■ Switching frequency up to 2 MHz
5.3 External Gate Drivers
These gate drivers enable the use of external FETs with higher
current capabilities or lower RDS(ON). The external gate drivers
directly drive MOSFETs that are used in switching applications.
The gate driver provides multiple programmable drive strength
steps to enable improved EMI management. The external gate
drivers include the following key features:
■ Programmable drive strength options (25%, 50%, 75%, 100%)
for EMI management
■ Rise and fall times at 55 ns with 4 nF load
5.4 Dimming Modulation Schemes
There are three dimming modulation schemes available with the
PowerPSoC. The configurable modulation schemes are:
■ Precise intensity signal modulation (PrISM)
■ Delta Sigma modulation mode (DMM)
■ Pulse-width modulation (PWM)
5.4.1 PrISM Mode Configuration
■ High resolution operation up to 16 bits
■ Dedicated PrISM module enables customers to use core PSoC
digital blocks for other needs
■ Clocking up to 48 MHz
■ Selectable output signal density
■ Reduced EMI
The PrISM mode compares the output of a pseudo-random
counter with a signal density value. The comparator output
asserts when the count value is less than or equal to the value
in the signal density register.
5.4.2 DMM Mode Configuration
■ High resolution operation up to 16 bits
■ Configurable output frequency and delta sigma modulator
width to trade off repeat rates versus resolution
■ Dedicated DMM module enables customers to use PSoC
digital blocks for other uses
■ Clocking up to 48 MHz
The DMM modulator consists of a 12-bit PWM block and a 4-bit
delta sigma modulator (DSM) block. The width of the PWM, the
width of the DMM, and the clock defines the output frequency.
The duty cycle of the PWM output is dithered by using the DSM
block which has a user-selectable resolution up to 4 bits.
5.4.3 PWM Mode Configuration
■ High resolution operation up to 16 bits
■ User programmable period from 1 to 65535 clocks
■ Dedicated PWM module enables customers to use core PSoC
digital blocks for other use
■ Interrupt on rising edge of the output or terminal count
■ Precise PWM phase control to manage system current edges
■ Phase synchronization among the four channels
■ PWM output can be aligned to left, right, or center
The PWM features a down counter and a pulse width register.
A comparator output is asserted when the count value is less
than or equal to the value in the pulse width register.
5.5 Current Sense Amplifier
The high side current sense amplifiers provide a differential
sense capability to sense the voltage across current sense
resistors in lighting systems. The current sense amplifier
includes the following key features:
■ Operation with high common mode voltage to 32 V
■ High common mode rejection ratio
■ Programmable bandwidth to optimize system noise immunity
An off-chip resistor Rsense is used for high side current
measurement as shown in Figure 5-3. on page 11. The output of
the current sense amplifier goes to the power peripherals analog
multiplexer where, you select the hysteretic controller to which
ILED
DIM
ON
OFF
REF_B
REF_A
Hyst Out
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