参数资料
型号: NCP1652L48VGEVB
厂商: ON Semiconductor
文件页数: 31/34页
文件大小: 0K
描述: BOARD EVAL 100W 48V NCP1652 PFC
产品变化通告: 1Q2012 Discontinuation 30/Mar/2012
标准包装: 1
系列: *
其它名称: NCP1652L48VGEVB-ND
NCP1652L48VGEVBOS
NCP1652, NCP1652A
V CC
V CC(on)
V CC(off)
t
OUTA
t
Last OUTB Pulase
OUTB
t
V FF
V BO(low)
V BO(high)
Brown ? Out
t
Figure 68. Relationship Between the Brown ? Out, V CC , OUTA and OUTB
Vaux or VCC
VDD
OVP comparator
+
Latch ? Off
I latch(clamp)
+
?
V latch(high)
blanking
t latch(delay)
I latch(shdn)
+
OTP comparator
?
+
S
R
Q
Latch
NTC
V latch(clamp)
V latch(low)
Figure 69.
Reset
Latch Input
The NCP1652 has a dedicated latch input to easily latch
the controller during overtemperature and overvoltage
faults (See Figure 69). The controller is latched if the
Latch ? Off pin voltage is pulled below 1 V or above 6.5 V.
Once the controller is latched, OUTA is disabled and OUTB
generates a final pulse that ends with the oscillator period.
No more pulses are generated after OUTB is terminated.
Figure 70 shows the relationship between the Latch ? Off,
V CC , OUTA and OUTB signals.
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