参数资料
型号: ZY8110G
厂商: Power-One
文件页数: 23/28页
文件大小: 0K
描述: PROGBL CONVERT DC-DC 10A OUT THR
特色产品: ZY Series Converters
标准包装: 48
系列: 智能 POL 转换器
类型: 非隔离(POL)
输出数: 1
电压 - 输入(最小): 8V
电压 - 输入(最大): 14V
Voltage - Output 1: 0.5 ~ 5.5 V
电流 - 输出(最大): 10A
电源(瓦) - 制造商系列: 55W
安装类型: 通孔
封装/外壳: 11-SIP 模块
尺寸/尺寸: 1.20" L x 0.26" W x 0.84" H(30.5mm x 6.7mm x 21.4mm)
包装: 托盘
工作温度: 0°C ~ 70°C
效率: 91.6%
电源(瓦特)- 最大: 55W
产品目录页面: 2739 (CN2011-ZH PDF)
其它名称: 179-2403
ZY8110G-R1
ZY8110 10A DC-DC Intelligent POL
8V to 14V Input ? 0.5V to 5.5V Output
Data Sheet
Figure 41 shows the input voltage noise of the three-
output system with programmed interleave. Instead
of all three POLs switching at the same time as in
the previous example, the POLs V1, V2, and V3
switch at 67.5°, 180°, and 303.75°, respectively.
Noise is spread evenly across the switching cycle
resulting in more than 1.5 times reduction. To
compared to the steady-state duty cycle as
expressed by the above equation. This will further
protect the output from excessive voltages. The duty
cycle limit can be programmed in the GUI PWM
Controller window or directly via the I 2 C bus by
writing into the DCL register shown in Figure 42.
achieve similar noise reduction without the interleave
will require the addition of an external LC filter.
R/W-1
DCL5
R/W-1
DCL4
R/W-1
DCL3
R/W -0
DCL2
R/W -1
DCL1
R/W-0
DCL0
R/W-0
HI
R/W-0
LO
Bit 7
Bit 7:2 DCL[5:0] , Duty Cycle Limitation
00h: 0
01h: 1/192
3Fh: 63/192
Bit 0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
Bit 1:
Bit 0:
HI , ADC high saturation feed -forward
0: disabled
1: enabled
LO , ADC low saturation feed -forward
0: disabled
1: enabled
Figure 42. Duty Cycle Limit Register
8.4.4 ADC Saturation Feedforward
To speed up the PWM response in case of heavy
dynamic loads, the duty cycle can be forced either to
DC ?
,
Figure 41. Input Voltage Noise with Interleave
ZY8110 interleave is independent of the number of
POLs in a system and is fully programmable in
11.25 ? steps. It allows maximum output noise
reduction by intelligently spreading switching energy.
Note : Due to noise sensitivity issues that may occur in limited
cases, it is recommended to avoid phase lag settings of
112.5 and 123.75 degrees, otherwise false PG and/or OV
indications may occur.
8.4.3 Duty Cycle Limit
The ZY8110 is a step-down converter therefore V OUT
is always less than V IN . The relationship between
the two parameters is characterized by the duty
cycle and can be estimated from the following
equation:
V OUT
V IN . MIN
Where, DC is the duty cycle, V OUT is the required
maximum output voltage (including margining),
V IN.MIN is the minimum input voltage.
It is good practice to limit the maximum duty cycle of
the PWM controller to a somewhat higher value
0 or the duty cycle limit depending on the polarity of
the transient. This function is equivalent to having
two comparators defining a window around the
output voltage setpoint. When an error signal is
inside the window, it will produce gradual duty cycle
change proportional to the error signal. If the error
signal goes outside the window (usually due to large
output current steps), the duty cycle will change to its
limit in one switching cycle. In most cases this will
significantly improve transient response of the
controller, reducing amount of required external
capacitance.
Under certain circumstances, usually when the
maximum duty cycle limit significantly exceeds its
nominal value, the ADC saturation can lead to the
overcompensation of the output error. The
phenomenon manifests itself as low frequency
oscillations on the output of the POL. It can usually
be reduced or eliminated by disabling the ADC
saturation or limiting the maximum duty cycle to 120-
140% of the calculated value. It is not recommended
to use ADC saturation for output voltages higher
than 2.0V.
The ADC saturation feedforward can be
programmed in the GUI PWM Controller window or
ZD-01991 Rev. 1.1, 01-Jul-10
www.power-one.com
Page 23 of 28
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