VJ1206Y224KXXAT ONSEMI [ON Semiconductor], VJ1206Y224KXXAT Datasheet

VJ1206Y224KXXAT

Manufacturer Part Number

VJ1206Y224KXXAT

Description

Low-Cost 100 mA High-Voltage Buck and Buck-Boost Using NCP1052

Manufacturer

ONSEMI [ON Semiconductor]

Datasheet

1.VJ1206Y224KXXAT.pdf (10 pages)

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AND8098/D

Low−Cost 100 mA

High−Voltage Buck and

Buck−Boost Using NCP1052

Prepared by: Kahou Wong

ON Semiconductor

100 mA non-isolated power supply using NCP1052 by

buck and buck-boost topology. The NCP1052 is one of the

latest low-cost switching controllers with integrated 700 V/

300 mA power switch from ON Semiconductor. It is

primarily designed for isolated 10 W-range flyback

converter. If isolation is not needed, the IC can also be used

as stepping-down buck and buck-boost converter for

further cost saving by removing optocoupler and replacing

the transformer by an inductor. The output current capability

is 100 mA. The possible operating range is from input range

between 20 Vdc and 700 Vdc to output range of 5.0 V or

above with 100 mA. Typical efficiency around 65% is

obtained in the 12 V buck demo board.

similar to each other. Their major difference is that buck

provides a positive output voltage but buck-boost provides

a negative output voltage referring to the input ground.

June, 2003 - Rev. 1

This application note presents low-cost high-voltage

Advantages of the proposed circuits include:

The proposed buck and buck-boost converters are very

Comparing to flyback, buck and buck-boost eliminates

optocoupler and replaces transformer by an inductor for

cost saving.

Buck and buck-boost offers smaller voltage stress in

switches comparing to flyback. It minimizes the

switching loss and increases efficiency.

NCP105x can power up itself from the high input

voltage with wide range between 20 Vdc and 700 Vdc.

It needs no extra supply circuit.

NCP105x operates at 44, 100, or 136 kHz and

accommodates low-cost components such as aluminum

electrolytic capacitors and powered-iron core magnetic.

NCP105x offers frequency jittering for reduced

electromagnetic inference (EMI).

NCP105x offers thermal and short circuit fault

protection.

Simple design as no control-loop compensation is

concerned.

Semiconductor Components Industries, LLC, 2003

INTRODUCTION

converters. The rectifier circuit, which consists of capacitor

voltage. Then, the NCP1052 is self-powered up from the

rectified input voltage directly with a V

When the switch inside the IC is opened, there is a voltage

across Drain (D) and Source (S) pins of the IC. If this voltage

is greater than 20 V, an internal current source I

(typ.) inside the IC charges up C

up for the operation of the IC. Comparing to the switching

frequency, the V

7.5-8.5 V hysteresis loop. This V

frequency jittering features to minimize EMI and

short-circuit fault timing function.

voltage powers up the IC through the path across the

inductor L and capacitor C. This charging path passes

Input

Figure 1 shows the proposed buck and buck-boost

In Figure 2a it is noted that in the buck topology the input

and diode D

Figure 1. Proposed Circuit Using NCP1052

PRINCIPLE OF OPERATION

, is in the front end for AC or DC input

APPLICATION NOTE

voltage level is in a lower-frequency

(b) Buck-boost

http://onsemi.com

(a) Buck

and a voltage in C

Publication Order Number:

hysteresis loop is for

capacitor C

start

AND8098/D

= 6.3 mA

Output

is built

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VJ1206Y224KXXAT Summary of contents

Page 1

AND8098/D Low−Cost 100 mA High−Voltage Buck and Buck−Boost Using NCP1052 Prepared by: Kahou Wong ON Semiconductor INTRODUCTION This application note presents low-cost high-voltage 100 mA non-isolated power supply using NCP1052 by buck and buck-boost topology. The NCP1052 is one of ...

Page 2

Hence, the value of C small enough to increase this charging frequency f order to reduce output voltage ripple because some efficiency is lost due to ...

Page 3

Hence, a zener diode Z “dummy” load resistor is needed to consume the minimum amount of energy as shown in Figure also noted that when ...

Page 4

In non-isolated topologies such as buck or buck-boost, the circuits are mainly designed for CCM. The CCM burst-mode waveform is different to the PWM waveform in Figure 5. Because of this characteristic, burst mode requires a higher peak value of ...

Page 5

NCP1052 will have a very high current limit effectively because there is a propagation delay (typically 135 ns) to turn off the switch. The current flowing through the inductor L includes three ...

Page 6

The proposed buck-boost is better in term of the standby ability because the V charging current in Figure 2(b) CC only passes through the inductor. The charging current pulses become an averaged energy stored in the inductor and ...

Page 7

... MRA4005T1 3 Z MMSZ12T1 1 Z MMSZ6V8T1 2 R CRCW08052001FRT1 1 C 594D227X9016R2T C VJ1206Y224KXXAT 1 C 595D685X9016A2T 2 C 400WA10M12.5X16 3 L UP2B-681 AND8098/D As shown in Figure inch by 1.5 inch small surface-mount demo board 100 mA buck is presented. The design is made on a single-sided board. The bill of material is shown in Table 2. The component symbols are those in Figure 1 ...

Page 8

V = 300 Vdc V = 100 Vdc 100 150 200 OUTPUT CURRENT (mA) (a) Load Regulation 200 ...

Page 9

Output 2 with 150 mA -5 -10 -15 -20 Output 1 with 200 mA -25 50 100 150 200 INPUT VOLTAGE (Vac) Figure 12. Line Regulation of the Dual Output Buck-boost AND8098/D 100 mA high-voltage low-cost buck and buck-boost ...

Page 10

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for ...

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