参数资料
型号: ZL2004ALNNT1
厂商: Intersil
文件页数: 23/42页
文件大小: 0K
描述: IC REG CTRLR BUCK SYNC ADJ 32QFN
标准包装: 1,000
PWM 型: 电压模式
输出数: 1
频率 - 最大: *
占空比: 95%
电源电压: 4.5 V ~ 14 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 32-VFQFN 裸露焊盘
包装: 带卷 (TR)
ZL2004
In addition to selecting the current sensing method, the
ZL2004 gives the power supply designer several
choices for the fault response during over or under
current condition. The user can select the number of
violations allowed before declaring fault, a blanking
time and the action taken when a fault is detected.
The blanking time represents the time when no current
measurement is taken. This is to avoid taking a reading
just after a current load step (less accurate due to
potential ringing). It is a configurable parameter.
Table 17. Pin-strap Settings for Current Sensing
ZL2004 provides an adjustable maximum full scale
sensing range. The range can be adjusted from 25 mV
to 50 mV using pin-strap or resistor setting method
described in Table 17 and Table 18.
Table 17 includes default parameters for the number of
violations and the blanking time using pin-strap.
Number of
Current Limit
Maximum
Allowed
ILIM Pin
Current Limiting Configuration
Violations
2
Threshold
V LIM
Current Sensing
Range
Output-referenced, down-slope sensing
LOW
(Inductor DCR sensing)
5
25 mV
25 mV
Blanking time: 224 ns
Output-referenced, down-slope sensing
OPEN
(Inductor DCR sensing)
5
35 mV
35 mV
Blanking time: 224 ns
Output-referenced, down-slope sensing
HIGH
(Inductor DCR sensing)
5
50 mV
50 mV
Blanking time: 224 ns
Resistor
1
Depends on resistor value used; see Table 18
Notes :
1. 10 k? < R ILIM0 < 100 k?
2. The number of violations allowed prior to issuing a fault response.
23
FN6846.3
February 15, 2011
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