NEC UPC1909GS, UPC1909CX Datasheet

DATA SHEET

Bipolar Analog Integrated Circuit

SWITCHING REGULATOR CONTROL IC

µµµµ

PC1909

The µPC1909 is a switching regulator control IC ideal for primary side control of active-clamp type
converters. This IC has 2 outputs employing a totem-pole circuit with peak output current 1.2 A, and is capable of
directly driving a power MOS-FET. As a result, it has been possible to realize primary side control of an active-clamp
type converter on a single chip.

It is necessary to obtain license from Vicor Corporation before using the µPC1909 in an active-clamp type

Note

circuit.

FEATURES

• 2 on-chip outputs; for Q and Q

• Capable of directly driving a power MOS-FET

• Drive supply voltage range: 7 V to 24 V

• On-chip remote control circuit

• On-chip pulse-by-pulse overcurrent protection circuit

• On-chip overvoltage latch circuit

ORDERING INFORMATION

Part Number Package

µ

PC1909CX 16-pin plastic DIP (300 mil s)

µ

PC1909GS 16-pin plastic SOP (300 mi l s )

Note

DC/DC

The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.

Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.

Document No. G14309EJ1V0DS00 (1st edition)
Date Published July 1999 N CP(K)
Printed in Japan

1999©

BLOCK DIAGRAM

C

16 15 14

OLS

T

Oscillator

µµµµ

PC1909

EMI

V

R

T

REF

DTC

1

FB

OUT

1

1

V

CC

13 12 11 10 9

PWM

Reference
power
supply

comparator 1

–
+
+

Over­voltage
protection

ON/OFF
control

Over­current
protection

+
–
–

PWM
comparator 2

1 2 3 4 5 6 7 8

OV C

T2

GND OC DTC

2

OUT

2

ON/OFF

EMI

2

2

Data Sheet G14309EJ1V0DS00

PIN CONFIGURATION (TOP VIEW)

16-pin plastic DIP (300 mils)

PC1909CX

µµµµ

16-pin plastic SOP (300 mils)

PC1909GS

µµµµ

µµµµ

PC1909

OV

C

GND

OC

DTC2
OUT2

ON/OFF

EMI

1

T2

2

3

4
512
611
710

2

89

16

15

14

13

CT

RT
VREF

DTC1

FB
OUT1
EMI1
VCC

PIN FUNCTION LIST

Pin Number Pin Name Function Pin Number Pin Name Function

1 OV Overvoltage protection 9 V
2CT2OLS shift setting 10 EMI
3 GND Ground 11 OUT
4 OC Overcurrent protection 12 FB Feedback i nput
5DTC
6OUT

2

OUT2 dead-time setting 13 DTC

2

OUT2 output 14 V
7 ON/OFF ON/OFF control 15 R
8EMI

2

OUT2 emitter 16 C

CC

REF

Power supply

1

OUT1 emitter

1

OUT1 output

1

OUT1 dead-time setting
Reference voltage output

T

T

Timing resistance
Timing capacitance

Data Sheet G14309EJ1V0DS00

3

ELECTRICAL SPECIFICATIONS

µµµµ

PC1909

Absolute Maximum Ratings (Unless otherwise specified, TA = 25

Parameter Symbol
Supply Voltage V
Output Current (DC, per output) I
Output Current (peak, per output) I

C (peak)

Total Power Dissipat i on P
Operating Ambient Temperature T
Operating Junction Temperature T
Storage Temperature T

CC

C (DC)

T

A

J

stg

PC1909CX

µ

C)

°°°°

PC1909GS Unit

µ

26 V

100 mA

1.2 A

1000 694 mW

20 to +85

−

20 to +150

−

55 to +150

−

Caution Product quality may suffer if the absolute maximum rating is exceeded even momentarily for any

parameter. That is, the absolute maximum ratings are rated values at which the product is on
the verge of suffering physical damage, and therefore the product must be used under
conditions that ensure that the absolute maximum ratings are not exceeded.

Recommended Operating Conditions

Parameter Symbol MIN. TYP. MAX. Unit

C

°

C

°

C

°

Supply Voltage V
Oscillation Frequency f
Output Load Capacitance C
Output Load Resistance R
Operating Junction Temperature T

CC

OSC

71024V

50 200 500 kHz

L

L

J

10 k

20 +100

−

2200 3000 pF

°

Ω

C

4

Data Sheet G14309EJ1V0DS00

µµµµ

PC1909

Electrical Characteristics (Unless otherwise specified, TA = 25

C, VCC = 10 V, RT = 10 k

°°°°

, fosc = 200 kHz)

ΩΩΩΩ

Block Parameter Symbol Conditions MIN. TYP. MAX. Unit

CC (SB)

CC (L to H)

REF

V

∆

O short

∆f/∆
∆f/∆

V

OSC

VCC = 7 V 0.1 mATotal

CC

Without load 6 12 18 mA

H

REF

REF

I

IN

8 V ≤ VCC ≤ 15 V,

REF

I

L

1 mA ≤ I

= 0 A 4.7 4.9 5.1 V

= 0 A

/∆T−10°C ≤ TA ≤ +85°C,

REF

= 0 A

I

REF

I

= 0 A 15 mA

V8 V
T

VCC ≤ 15 V 1 %

≤

−10°C ≤

8910VUnder­345V

110mV

REF

≤ 4 mA 6 12 mV

400 (700)

180 200 220 kHz

TA ≤ +85°C2(5)%

Voltage
Lockout
Circuit

Reference
Voltage

Oscillation

Standby Current I
Circuit Current I
Start-Up Threshold Voltage V
Operating Voltage Hysteres i s

Width

Output Voltage V
Line Regulation REG

Load Regulation REG
Output Voltage Temperature

Coefficient
Short Circuit Current I
Oscillation Frequency f
Frequency Line Regulation
Frequency Temperature

Coefficient

PWM
Comparator

Output

Remote
Control

Overcurrent
Latch

Overvoltage
Latch

B (COMP1)VCOMP1

I

B (COMP2)VCOMP2

I
Low-level Threshold Voltage V
High-level Threshold Voltage V
Dead-time Temperature

DT/∆T−10°C ≤ TA ≤ +85°C,

∆

Coeficient
Low-level Output Voltage V
High-level Output Voltage V
Rise Time t
Fall Time t
Input Voltage at Output ON V
Input Voltage at Output OFF V
Hysteresis Width V
Overcurrent Threshold Voltage V
Input Bias Current I
Delay to Output t
Overvoltage Threshold Voltage V
Input Bias Current I
OVL Reset Voltage V
Delay to Output t

TH (L)

TH (H)

OL

OH

r

f

IN (ON)

IN (OFF)

H

TH (OC)

B (OC)

d (OC)

TH (OV)

B (OV)

R (OV)

d (OV)

D

V

SINK

I

SOURCE

I
RL = 15 Ω, CL = 2200 pF 60 ns
RL = 15 Ω, CL = 2200 pF 40 ns

VCC = 0 V 200

VOV = V

REF

= V
= V

REF

10
10

1.5 V

3.5 V
3%

= 0.46 V

REF

= 3 mA 0.5 V

= 30 mA

VCC − 1.6

2.4 2.6 2.8 V

2.2 2.4 2.6 V

0.1 0.2 0.3 V

190 210 230 mV

150 ns

22.42.8V

REF

4

2V

750 ns

µ

V/°C

AInput Bias Current

µ

A

µ

V

A

µ

A

µ

Remark

Values in parentheses ( ) represent reference values.

Data Sheet G14309EJ1V0DS00

5