參數(shù)資料
型號： NCP4326DR2
廠商： ON SEMICONDUCTOR
元件分類： 模擬信號調(diào)理
英文描述： Secondary Controller for Multi−Output Quasi−Resonant Switchmode Power Supplies
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO16
封裝： SOIC-16
文件頁數(shù)： 7/30頁
文件大小： 432K
代理商： NCP4326DR2
NCP4326
http://onsemi.com
7
ELECTRICAL CHARACTERISTICS
(For typical values T
J
= 25
°
C, for min/max values T
J
= 0
°
C to +105
°
C, Vcc = 12 V unless
otherwise noted.)
Characteristic
Pin
Symbol
Min
Typ
Max
Unit
Drive Output
(Note 1)
Output Voltage Rise Time (C
L
= 1.0 nF, T
J
= 25
°
C)
11, 13
t
r1, 2
60
100
ns
Output Voltage Fall Time (C
L
= 1.0 nF, T
J
= 25
°
C)
11, 13
t
f1, 2
40
100
ns
Output Voltage Low State @ Vcc = 15 V
(Isink = 250 mA)
(Isink = 20 mA)
11, 13
V
OL1, 2
1.5
1.0
2.2
1.5
V
Output Voltage Low State with UVLO activated @ Vcc = 4.0 V
(Isink = 1.0 mA) (Note 1)
11, 13
V
OL_UVLO1, 2
0.5
1.0
V
Output Voltage High State @ Vcc = 15 V
(Isource = 250 mA)
(Isource = 20 mA)
11, 13
V
OH1, 2
11
12
13.4
13.5
V
Standby Pin
Input Threshold Voltage (V
STBY
increasing)
10
V
th
2.5
V
Hysteresis (V
STBY
decreasing)
10
V
H
600
mV
Standby Propagation Delay when the Standby Mode is activated
with 1 nF connected to DRVx pin and with V
CPx
> 4.0 V (Figure 4)
10
T
stby_on
550
ns
Standby Propagation Delay when the Standby Mode is released,
ENx pin is floating, V
CPx
> 4.0 V and with 1.0 nF connected to DRVx
pin (Figure 4)
10
T
stby_off
1.0
s
Pullup Resistor Value
10
R
pullup
40
k
Enable/SoftStart Pin
Enable SoftStart Mode or Disable Driver Mode Threshold
(Note 2, Figure 5)
3, 16
V
ENX_TH1
0.5
0.75
1.0
V
Maximum Voltage on ENx pin ending SoftStart and Enable the
Regulation Mode (Figure 5)
3, 16
V
ENX_TH2
4.5
4.8
V
Voltage on ENx pin when ENx is floating
3, 16
V
ENX_max1
5.0
V
Voltage on ENx pin with External Sink Current @ 500
A
3, 16
V
ENX_max2
5.1
V
Internal Current Source when V
ENX
= 2.5 V (Note 3)
3, 16
I
ENX
120
160
220
A
Turn ON Propagation Delay in SoftStart Mode (Note 4) when
applying an external falling edge on Flux pin from 100 mV to 0 V @
V
ENX
= 1.0 V, V
CPx
= 5.0 V and 1.0 nF connected to DRVx pin.
(Timing definition see Figure 6)
3, 14 and 11
or
16, 14 and 13
T
SS_ON
450
800
ns
Turn OFF Propagation Delay in SoftStart Mode (Note 4) when
applying an external rising edge on Flux pin from 0 V to 100 mV @
V
= 1.0 V, V
= 5.0 V and 1.0 nF connected to DRVx pin.
(Timing definition see Figure 6)
3, 16
T
SS_OFF
450
800
ns
Discharge time when the controller is placed in Standby or when the
Vcc is removed @ C
ENX
= 330 nF from 90% of V
EN_max1
to
V
ENX_TH1
(Figure 1)
3, 16
T
stby_disch
1.0
ms
1. The output drivers are kept OFF when the Vcc < UVLO level.
2. Below the V
ENX_TH1
threshold the driver is disabled and above this value the softstart duty cycle generation is allowed.
3. See characterization curve for charging current versus Vcc and V
ENX
.
4. SoftStart mode operation when the V
CPx
pin = 5.0 V (or when the controlled output voltage is not yet in regulation).
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