NCP1398B

Resonant Mode LLC Controller

The NCP1398B is a resonant mode llc controller from onsemi. View the full NCP1398B datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Official NCP1398B datasheet (PDF) — the source this page was extracted from.

Manufacturer

onsemi

NCP1398B Key Specifications

Parameter	Value
Package	SOIC-16 NB, Less Pin 13
Startup Current	620 uA max
ESD Capability HBM	2 kV
Operating Duty Cycle	50% (48% to 52%)
VCC Operating Voltage	up to 20 V
VCC Turn-On Threshold	10.5 V typ (9.7 V to 11.3 V)
Gate Drive Peak Current	1 A sink / 0.5 A source
Storage Temperature Range	-60 °C to +150 °C
Switching Frequency Range	50 kHz to 750 kHz
Dead-Time Adjustment Range	100 ns to 2 us
Output Rise/Fall Time (1 NF)	40 ns / 20 ns
High Voltage Bridge Pin (VBRIDGE)	-1 V to 600 V
Maximum Switching Frequency Clamp	525 kHz typ (Rfmax = 7.2 kOhm)
Supply Current (No Load, 300 KHz)	5.1 mA typ
Supply Current (1 NF Load, 300 KHz)	13.3 mA typ
Minimum Switching Frequency Accuracy	±3%
Floating Supply Voltage (VBOOT-VBRIDGE)	0 V to 20 V
Thermal Resistance Junction-To-Air (SOIC)	130 °C/W
Junction Temperature Range (Min/Max Specs)	-40 °C to +125 °C
VCC Minimum Operating Voltage After Turn-On	9.5 V typ (8.7 V to 10.3 V)

NCP1398B Overview

Part: NCP1398B/C — onsemi

Type: Resonant Mode (LLC) Controller with Integrated High-Voltage Gate Drivers

Description: High performance half-bridge LLC resonant controller with a 50–750 kHz switching range, ±3% accurate minimum-frequency clamp, 600 V high-side driver and 1 A / 0.5 A peak sink/source drive capability.

Operating Conditions:

Supply voltage: VCC turn-on at 10.5 V typ (9.7–11.3 V); minimum operating voltage after turn-on 9.5 V typ (8.7–10.3 V); up to 20 V
Junction temperature (min/max specs): -40 to +125 °C
Switching frequency: 50 kHz to 750 kHz

Absolute Maximum Ratings:

Max supply voltage (VCC and FB pins): 20 V
High-voltage bridge pin: -1 to 600 V
Floating supply (VBOOT - VBRIDGE): 0 to 20 V
Storage temperature: -60 to +150 °C
ESD: HBM 2 kV (except pins 14, 15, 16); Machine Model 200 V

Key Specs:

Startup current (VCC < VCC ON): 620 μA max
Supply current, no load, Fsw = 300 kHz: 5.1 mA typ; with 1 nF load: 13.3 mA typ
Fault/disable mode consumption: 1.05 mA typ; skip mode: 2.2 mA typ
Minimum switching frequency (Rt = 31 kΩ): 60 kHz typ (57.2–61.8 kHz over -40 to 125 °C)
Maximum frequency clamp (Rfmax = 7.2 kΩ): 525 kHz typ (465–585 kHz)
Dead time (RDT = 10 kΩ): 290 ns typ (250–340 ns); adjustable from 100 ns to 1.9 μs
Driver rise/fall time (1 nF): 40 ns / 20 ns typ; ROH 13 Ω, ROL 5.5 Ω
Brown-out threshold: 1.008 V typ (0.98–1.08 V); thermal shutdown 140 °C min with 30 °C hysteresis

Features:

Adjustable minimum switching frequency with ±3% accuracy
Adjustable dead time and externally adjustable soft-start
Precise, high-impedance brown-out protection
Latched input for severe faults (e.g. over temperature, OVP)
Latched output short-circuit protection
Timer-based auto-recovery overcurrent protection
Open feedback loop protection (NCP1398B)
Skip mode with adjustable hysteresis
Disable input for ON/OFF control
Common collector optocoupler connection for easier ORing
Internal temperature shutdown
Pb-free and halogen-free

Applications:

High power AC/DC adapters
Flat panel display power converters
Computing power supplies
Offline battery chargers
Industrial and medical power sources

Package:

SOIC-16 NB, less pin 13 (D suffix, case 751AM)

NCP1398B Features

Adjustable Minimum Switching Frequency with ± 3% Accuracy
High -Frequency Operation from 50 kHz up to 750 kHz
Adjustable Dead -Time
Precise and High Impedance Brown -Out Protection
Startup Sequence Via an Externally Adjustable Soft -Start
Latched Input for Severe Fault Conditions, e.g. Over Temperature or OVP
Latched Output Short -Circuit Protection
Timer -Based Auto -Recovery Overcurrent Protection
Open Feedback Loop Protection for NCP1398B Version
Skip Mode with Adjustable Hysteresis
Disable Input for ON/OFF Control
VCC Operation up to 20 V
Common Collector Optocoupler Connection for Easier ORing
1 A / 0.5 A Peak Current Sink / Source Drive Capability
Internal Temperature Shutdown
Designed with Open Pin Testing Safety Considerations
Designed with Pin -to -Adjacent -Pin Short Testing Safety Considerations
These Devices are Pb -Free and Halogen Free/BFR Free

NCP1398B Applications

High Power AC/DC Adapters
Flat panel Display Power Converters
Computing Power Supplies
Offline Battery Chargers
Industrial and Medical Power Sources

http://onsemi.com

SOIC -16 NB, Less Pin 13 D SUFFIX CASE 751AM

NCP1398B Pin Configuration

Pin N 5	Pin Name	Function	Pin Description
1	BO	Brown - Out	Detects low input voltage conditions. When brought above Vlatch (4V), fully latches off the controller.
2	Ctimer	Fault timer duration	Sets the fault timer and auto - recovery durations
3	Discharge	Overload protection	Implements frequency shift in case of overload.
4	Fmax	Maximum frequency clamp	A resistor connected between this pin and GND sets the maximum fre- quency excursion. Controller enters skip mode and disables drivers if the operating frequency exceeds this adjusted value.
5	Rt	Minimum frequency clamp	Connecting a resistor to this pin, sets the minimum oscillator frequency reached for VFB = 1.1 V. Discharge OCP and Soft Start networks before startup or reset.
6	DT	Dead - time adjust	A simple resistor adjusts the dead - time
7	FB	Feedback	Voltage on this pin modulates operating frequency between adjusted Fmin and Fmax clamps. Starts Fault timer when FB voltage stays below 0.28 V - function not active on NCP1398C version.
8	Skip/Disable	Skip or Disable input	Defines frequency and thus also FB voltage under which the controller returns from skip mode. Upon release, a clean startup sequence occurs if VFB < 0.28 V. During the skip mode, when FB doesn't drop below 0.28 V, the IC restarts without soft start sequence.
9	OLP	Overload protection detection input	Initiates fault timer when asserted. Increases operating frequency via discharge pin to protect application power stage. This input features also latch fault comparator that latches off the IC permanently.
10	Mlower	Low side output	Drives the lower side MOSFET
11	GND	IC ground	-
12	V CC	Supplies the controller	The controller accepts up to 20 V
13	NC	Not connected	Increases the creepage distance
15	Mupper	High side output	Drives the higher side MOSFET
14	HB	Half - bridge connection	Connects to the half - bridge output
16	Vboot	Bootstrap pin	The floating V CC supply for the upper stage

Figure 2. Internal Circuit Architecture - NCP1398C

Figure 3. Internal Circuit Architecture - NCP1398B

NCP1398B Electrical Characteristics

(For typical values T J = 25 ° C, for min/max values T J = -40 ° C to +125 ° C, Max T J = 150 ° C, V CC = 12 V unless otherwise noted)

Symbol	Rating	Pin	Min	Typ	Max	Unit
SUPPLY SECTION
VCC ON	Turn - on threshold level, Vcc going up	12	9.7	10.5	11 . 3	V
VCC (min)	Minimum operating voltage after turn - on	12	8.7	9.5	10.3	V
Vboot ON	Startup voltage on the floating section	16 - 15	8	9	10	V
Vboot (min)	Cutoff voltage on the floating section	16 - 15	7.4	8.4	9.4	V
Istartup	Startup current, V CC < VCC ON	12	-	-	620	m A
VCC reset	V CC level at which the internal logic gets reset	12	-	6.6	-	V
ICC1+Iboot1	Internal IC consumption, no output load on pin 15/14 - 11/10, Fsw = 300 kHz, Rdt = 10 k W , RT = 31 k W , RFmax = 7.2 k W , RSkip/Disable = 7.9 k W , VFb = 3.6 V	12 - 11 16 - 15	-	5.1	-	mA
ICC2+Iboot2	Internal IC consumption, 1 nF output load on pin 15/14 - 11/10, Fsw = 300 kHz, Rdt = 10 k W , RT = 31 k W , RFmax = 7.2 k W , RSkip/Disable = 7.9 k W , VFb = 3.6 V	12 - 11 16 - 15	-	13.3	-	mA
ICC3+Iboot3	Consumption in fault or disable mode, All drivers disabled, Rdt =10 k W , RFmin = 31 k W , RFmax = 7.2 k W , RSkip/Disable = 7.9 k W , VFb = 1 V	12 - 11 16 - 15	-	1.05	-	mA
ICC4+Iboot4	Consumption in skip mode , All drivers disabled, Rdt =10 k W , RFmin = 31 k W , RFmax = 7.2 k W , RSkip/Disable = 7.9 k W , VFb = 5.7 V	12 - 11 16 - 15	-	2.2	-	mA
VOLTAGE CONTROL OSCILLATOR (VCO)	VOLTAGE CONTROL OSCILLATOR (VCO)
Fsw_min	Minimum switching frequency, Rt = 31 k W on pin 5, Vpin 7 = 0.8 V, DT = 300 ns 0 to 125 ° C - 40 to 125 ° C	5	58.2 57.2	60 60	61.8 61.8	kHz

Guaranteed by design.
Not tested for NCP1398C.

NCP1398B Absolute Maximum Ratings

Rating	Symbol	Value	Unit
High Voltage bridge pin	VBRIDGE	- 1 to 600	V
Floating supply voltage	VBOOT - VBRIDGE	0 to 20	V
High side output voltage	VDRV_HI	VBRIDGE - 0.3 to VBOOT+0.3	V
Low side output voltage	VDRV_LO	- 0.3 to V CC + 0.3	V
Allowable output slew rate	dV BRIDGE /dt	50	V/ns
FB and V CC pin voltage (pins 7 and 12)	V CC	- 0.3 to 20	V
Maximum voltage, all pins (except pins 7, 12, 14, 15 and 16)	-	- 0.3 to 10	V
Thermal Resistance Junction - to - Air, PDIP version	R q J - A	100	° C/W
Thermal Resistance Junction - to - Air, SOIC version	R q J - A	130	° C/W
Storage Temperature Range	-	- 60 to +150	° C
ESD Capability, HBM model , Except pins 14, 15, 16	-	2	kV
ESD Capability, Machine Model	-	200	V

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.

This device(s) contains ESD protection and exceeds the following tests: Human Body Model 2000 V per JEDEC Standard JESD22 -A114E

Machine Model 200 V per JEDEC Standard JESD22 -A115 -A

This device meets latch -up tests defined by JEDEC Standard JESD78.

NCP1398B Typical Application

High Power AC/DC Adapters
Flat panel Display Power Converters
Computing Power Supplies
Offline Battery Chargers
Industrial and Medical Power Sources

http://onsemi.com

SOIC -16 NB, Less Pin 13 D SUFFIX CASE 751AM

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These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part Number	Manufacturer	Package
NCP1398C	onsemi	—

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All Power Management datasheets All onsemi datasheets (337)

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