© Semiconductor Components Industries, LLC, 2015
October, 2015 − Rev. 6
1 Publication Order Number:
NCP1397/D
NCP1397A/B, NCV1397A/B
High Performance Resonant
Mode Controller with
Integrated High-Voltage
Drivers
The NCP1397 is a high performance controller that can be utilized
in half bridge resonant topologies such as series resonant, parallel
resonant and LLC resonant converters. It integrates 600 V gate
drivers, simplifying layout and reducing external component count.
With its unique architecture, including a 500 kHz Voltage Controlled
Oscillator whose control mode permits flexibility when an ORing
function is required, the NCP1397 delivers everything needed to build
a reliable and rugged resonant mode power supply.
The NCP1397 provides a suite of protection features with
configurable settings to optimize any application. These include:
auto−recovery or fault latch−off, brown−out, open optocoupler,
soft−start and short−circuit protection. Deadtime is also adjustable to
overcome shoot through current.
Features
High−Frequency Operation from 50 kHz up to 500 kHz
600 V High−Voltage Floating Driver
Adjustable Minimum Switching Frequency with ±3% Accuracy
Adjustable Deadtime from 100 ns to 2 ms.
Startup Sequence Via an Externally Adjustable Soft−Start
Brown−Out Protection for a Simpler PFC Association
Latched Input for Severe Fault Conditions, e.g. Over Temperature
or OVP
Timer−Based Input with Auto−Recovery Operation for Delayed
Event Reaction
Latched Overcurrent Protection
Disable Input for Immediate Event Reaction or Simple ON/OFF
Control
V
CC
Operation up to 20 V
Low Startup Current of 300 mA
1 A/0.5 A Peak Current Sink/Source Drive Capability
Common Collector Optocoupler Connection for Easier ORing
Optional Common Emitter Optocoupler Connection
Internal Temperature Shutdown
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
Flat Panel Display Power Converters
High Power ac−dc Adapters for Notebooks
Computing Power Supplies
Industrial and Medical Power Sources
Offline Battery Chargers
PIN CONNECTIONS
MARKING DIAGRAMS
x = P (standard) or V (automotive)
y = A or B
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
SO−16, LESS PIN 13
D SUFFIX
CASE 751AM
1
16
1
2
3
4
5
6
7
8
16
15
14
12
11
10
9
(Top View)
BO
CSS(dis)
Fmax
Ctimer
Rt
FB
DT
Skip/Disable
Vboot
Mupper
V
CC
Mlower
Fault
HB
GND
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
ORDERING INFORMATION
1
16
NCx1397yG
AWLYWW
www.onsemi.com
NCP1397A/B, NCV1397A/B
www.onsemi.com
2
Figure 1. Typical Application Example
R18
PIN FUNCTION DESCRIPTION
Pin # Pin Name Function Pin Description
1 CSS(dis) Soft−Start Discharge Soft−start capacitor discharge pin. Connect to the soft−start capacitor to reset it
before startup or during overload conditions.
2 Fmax Maximum frequency clamp A resistor sets the maximum frequency excursion
3 Ctimer Timer duration Sets the timer duration in presence of a fault
4 Rt Minimum frequency clamp Connecting a resistor to this pin, sets the minimum oscillator frequency reached
for V
FB
= 1 V.
5 BO Brown−Out Detects low input voltage conditions. When brought above V
latch
(4 V typically), it
fully latches off the controller.
6 FB Feedback Injecting current into this pin increases the oscillation frequency up to Fmax.
7 DT Deadtime A simple resistor adjusts the dead−time width
8 Skip/Disable Skip or Disable input Upon release, a clean startup sequence occurs if V
FB
< 0.3 V. During the skip
mode, when FB doesn’t drop below 0.3 V, the IC restarts without soft−start
sequence.
9 Fault Fault detection input When asserted, the external timer starts to countdown and shuts down the
controller at the end of its time duration. Simultaneously the Soft−Start discharge
switch is activated so the converter operating frequency goes up to protect
application power stage. This input features also second fault comparator with
higher threshold (1.5 V typically) that:
A) Speeds up the timer capacitor charging current 8 times – NCP1397A
B) latches off the IC permanently – NCP1397B
In both versions the second fault comparator helps to protect application in case
of short circuit on the output or transformer secondary winding.
10 GND Analog ground
11 Mlower Low side output Drives the lower side MOSFET
12 V
CC
Supplies the controller The controller accepts up to 20 V
13 NC Not connected Increases the creepage distance
14 HB Half−bridge connection Connects to the half−bridge output
15 Mupper High side output Drives the higher side MOSFET
16 Vboot Bootstrap pin The floating V
CC
supply for the upper stage
NCP1397A/B, NCV1397A/B
www.onsemi.com
3
Figure 2. Internal Circuit Architecture (NCP1397A)
Vref
Rt
VDD
C
IDT
+
+
DT Adj.
I = Imax for Vfb = 5.3 V
I = 0 for Vfb < Vfb(min)
Imin
VFB
VFB(o )
Vref
VDD
Imax
VFB = 5
Fmax
VDD
Itimer1
+
T
imer
+
Vref
PON Reset
Vtimer OFF
Reset
SS(dis)
FB
RFB
+
+
VFB(fault)
+
G = 1
> 0 only
V=V (FB) −
− VFB(min)
IDT
Vref
VDD
+
VFB(min)
DT
Deadtime
Adjustment
VDD
+
BO
+
VBO
+
+
Vlatch
Clk
D
S
Q
Q
R
S
Q Q
R
PON Reset
50% DC
Temperature
Shutdown
VCC
Management
PON
Reset
Fault
Timeout
Fault
Vref
BO
Reset
FF
+
+
Vref Skip/Disable
Skip/
Disabl
e
V
CC
Timeout
Fault
Fault
Mlowe
r
GND
IBO
20 ns Noise
Filter
+
Fault
+
Vref(fault)
NC
V
BOOT
Muppe
r
HB
UVLO
Fast
Fault
+
+
Vref(OCP)
Vdd
Itimer2
Level
Shifter
20 ms Noise
Filter
Fault
PON Reset
Enable
(if Vfb<0.3V)
20 ms Noise
Filter
1 ms Noise
Filter

NCV1397BDR2G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Switching Controllers RESONANT MODE CONTRO
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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