HIT HA16138PS Datasheet

HA16138PS

AC/DC Switching Converter Controller IC

With High-Voltage Power MOS FET

ADE-204-032 (Z)

Preliminary

1st Edition

MAY 2000

Description

The HA16138PS is an IC with a high-voltage power MOS FET and current-mode type PWM controller
mounted in a DILP-8 (DP-8) standard package, suitable for low-power power supplies in the
10 W class and below.

The HA16138PS includes an energy-saving mode for holding down power consumption when on standby
(no load). When the energy-saving mode is entered, the operating frequency is reduced to 1/4 the normal
frequency, reducing power consumption. A starter circuit is also provided on-chip, eliminating the need for
the external start-up resistance needed with previous controller ICs. The starter circuit in this IC is turned
off automatically after the IC starts up, enabling the start-up resistance power consumption to be decreased.

The HA16138PS includes a soft start circuit, OVP circuit, and remote on/off circuit, making it possible to
configure a simple protection circuit with fewer external parts than previously. Also provided are a current
sense resistance and a leading edge blanking circuit that masks spike noise on current sense input, making
noise reduction in a power supply set comparatively easy.

The HA16138PS is equipped with an error amp circuit inverting input (FB) pin and output (COMP) pin,
enabling special-purpose design for both flyback system secondary-side output voltage detection and
primary-side back-up transformer output voltage detection types.

Features

• Built-in high-voltage power MOS FET

• Energy-saving mode (power saving through reduction of operating frequency to 1/4 normal frequency

when on standby)

• Built-in starter circuit, reducing power loss of start-up resistance when on standby (external start-up

resistance not necessary)

• Built-in soft start circuit, eliminating need for external connection

• Remote on/off function, enabling power saving by halting PWM output without turning off power

supply

• Built-in current sense resistance and leading edge blanking circuit, for sense-resistance-less and noise-

cancellation-filter-less implementation

• Built-in over voltage protection circuit

• Built-in over temperature protection circuit

HA16138PS

Pin Arrangement

1DRAIN

2DRAIN

3VDD

4FB

DILP-8

(DP-8)

(Top view)

SOURCE

8

SGND

7

CT

6

COMP

5

Pin Functions

Pin No. Pin Name Pin Function

1 DRAIN On-chip power MOS FET drain pin / starter circuit input pin
2 DRAIN On-chip power MOS FET drain pin / starter circuit input pin
3 VDD Power supply voltage input pin
4 FB Error amplifier inverting input pin / OVP latch circuit input pin
5 COMP Error amplifier output pin
6 CT Timing capacitance connection pin / on/off circuit input pin
7 SGND Primary-side common connection pin
8 SOURCE On-chip power MOS FET source pin

2

Block Diagram

HA16138PS

VDD

CT

FB

Oscillator

VDD

Vref

−

+

E-AMP

VDD

RSQ

+

−

OVP Latch

+

−

ON/OFF
Comp.

1/4 Divider

+

−

Frequency Down
Comp.

TSD

COMP

Vref
Generator

CK

DQ

1/3
Attenuator

UVL

UVL

FF

Vref

+

−

Soft Start

UVL

CS
Comp.

Leading Edge
Blanking

+

−

Delay

Starter

Driver

DRAIN

SOURCE

Rcs

3

HA16138PS

Absolute Maximum Ratings (Ta = 25°C)

Item Symbol Rating Unit

Power MOS FET block Drain-source voltage V

Maximum drain current I

Controller block Power supply voltage V

CT pin voltage V
FB pin voltage V
COMP pin voltage V

DS

DS

DD

CT

FB

COMP

Overall Operating temperature Topr −20 to +85 °C

Junction temperature Tjmax +150 °C
Storage temperature Tstg −55 to +150 °C

−0.3 to 700 V

0.5 A
0 to 15 V
0 to V

DD

0 to V

DD

0 to 5 V

V
V

4

HA16138PS

Electrical Characteristics (Tj = 25°C, VDD = 12 V, fosc1 = 100 kHz)

Item Symbol Min Typ Max Unit Test Conditions

Power Drain-source voltage BV
MOS FET Drain-source on resistance R
Starter Start-up start drain voltage V
circuit Start-up charge current I
UVL circuit Operation start power supply

V

DS(on)

DRN

CHG

TH

voltage
Operation stop power supply

V

TL

voltage
Operating power supply current I

DD

Oscillation Normal mode operating frequency fosc1 88 100 112 kHz CT = 220 pF
circuit F-down mode operating frequency fosc2 22 25 28 kHz CT = 220 pF, V

Maximum on duty Dumax  70  %

Error Open-loop voltage gain A

V

amplifier Unity gain bandwidth BW  550  kHz Rcomp = 220 kΩ

Output high voltage 1 V
Output high voltage 2 V
Output low voltage V

Non-inverting input voltage V
Power Output rise time t
MOS FET Output fall time t
gate drive Output high voltage V
circuit Output low voltage V
Current Current sense voltage gain A

COMPH1

COMPH2

COMPL

(+)EA

r

f

OH

OL

VCS

sense Current sense response time tpdcs  200  ns Vcomp = 5.0 V
circuit Leading edge blanking time t

BL

OVP latch OVP latch set voltage Vovp 4.2 5.0 5.8 V Vovp: FB pin voltage
circuit OVP latch reset voltage Vovpr  4.0  V Vovpr: VDD pin voltage

OVP latch current dissipation Iovp  1.1 1.7 mA VFB = 6.0 V
Remote

Off mode start voltage Voff 3.6 3.8 4.0 V Voff: CT pin voltage
on/off circuit

Soft start

Soft start time tst (1.0) 2.0 (3.0) ms Time from start-up to
circuit

f-down

F-down mode start voltage Vfdcp 0.7 0.85 1.0 V
comparator

Over
temperature

Over temperature protection start

temperature

TSD  150 °C TSD: Power MOS FET

protection
circuit

700 V

DSS

 12 20 Ω ID = 0.4 A
55 75 95 V
125 250 500 µA
10 11 12 V

789V

 2.5 4.0 mA

50 65  dB Rcomp = 220 kΩ

4.5 5.0  V Iosource = 0 µA

4.3 4.8  V Iosource = 100 µA
 0.50 0.75 V Iosink = 0 µA

3.4 3.8 4.2 V

 100  ns CL = 1000 pF
 80  ns CL = 1000 pF
 10  V Iosource = 25 mA
 0.5  V Iosink = 25 mA
 3.0  V/V

 300  ns

COMP

max. duty

junction temperature

= 0 V

5

HA16138PS

Functional Description

Note: Unless specified otherwise, characteristic values in the text and figures are typical values or design

values.

Starter Circuit

When power is turned on, the starter circuit operates during standby mode, and a constant current is
supplied from the drain pins to the VDD pin. This constant current supplies the external capacitance
charge current for charging up the VDD pin and the standby current consumed by the IC itself while on
standby.

Therefore, the start-up bleeder resistance required by previous products with no on-chip starter circuit is no
longer necessary. The starter circuit detects both the drain voltage and the VDD pin voltage, and controls
VDD so that the IC does not start up if the drain voltage is less than 75 V.

Vb+

0

DRAIN

75V

0

Istart

VDD

CT

COMP

DC
OUTPUT

0

11V

8V

0

0

0

0

Figure 1 Start-Up Timing

UVL Circuit

The UVL circuit is a function that monitors the VDD voltage, and stops IC operation if VDD is low. The
VDD detection voltage has a hysteresis characteristic; the operating start VDD voltage is 11 V, and the
operation stop voltage, 8 V.

In standby mode at the operation stop voltage or below, the UVL circuit keeps the power MOS FET turned
off, and performs control of soft start circuit resetting, internal reference voltage circuit stoppage, and so
forth.

6