TSC TS34063 Technical data

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TS34063

Dc to Dc Converter Controller

Pin assignment:

1. SC

2. SE

3. CT

4. Gnd

5. Comp.

6. Vcc

7. Ipk

8. Vdriver

Supply Voltage Range 3 V to 40V

Output Driving Current 1.5A

Oscillator Frequency up to 100KHz

General Description

The TS34063 is a monolithic switching regulator and subsystem intended for use as DC to DC converter. It contains an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active peak current limit circuit, drive and a high current output switch. The TS34063 is specifically designed to be incorporated in step-up, step-down and voltage inverting converter applications. The TS34063 is offered in SOP-8 and DIP-8 package.

Features

 Power forward control circuit  Operating voltage form 3V to 40V  Low standby current  Current limit adjustable  Output switch current up to 1.5A  Variable oscillator frequency up to 100KHz (max)

 Output voltage adjustable

Pin Descriptions

Name Description

SC Switch Collector SE Switch Emitter CT Timing Capacitor

Gnd Ground

Comp. Comparator Inverting Input

Vcc Vcc Collector

Ipk Ipk Sense

Vdriver Driver

Applications

 Charger  xD-ROM, xDSL product

 DC to DC converter s

Block Diagram

Ordering Information

Part No.

TS34063CD DIP-8 TS34063CS

Operating Temp.

(Ambient)

-20 ~ +85

Package

SOP-8

TS34063 1-8 2003/12 rev. C

Absolute Maximum Rating

Supply Voltage VCC 40 V Comparator Input Voltage Range VFB - 0.3 ~ 40 V Switch Collector Output Voltage V Switch Emitter Voltage V Switch Collector to Emitter Voltage V Driver Collector Voltage Vc(driver) 40 V Driver Collector Current (note 1) Ic(driver) 100 mA Output Switching Current ISW 1.5 A Power Dissipation DIP-8 SOP-8 Operating Junction Temperature Range TJ -0 ~ +125 Storage Temperature Range T Note: Maximum package power dissipation limits must be observed

40 V

C(SW)

40 V

E(SW)

40 V

CE(SW)

-65 ~ +150

STG

1.0

0.5

Electrical Characteristics (V

=5V, Ta =25

C; unless otherwise specified.)

Parameter Symbol Test Conditions Min Typ Max Unit

Oscillator (OSC)

Frequency F Charge Current I Discharge Current I

Discharge to Charge current ratio Current Limit Sense Voltage V

CT = 1nF, Vpin5= 0V 24 33 42 KHz

OSC

VCC = 5V ~ 40V -- 30 -- uA

CHARGE

DISCHARGEVCC

DISCHARGE

/ I

IPK(SENSE)IDISCHARGE

CHARGE

= 5V ~ 40V -- 200 -- uA

Pin7 to Vcc -- 6.5 -- --

= I

250 -- 350 mV

CHARGE

Output switch (note1)

Saturation Voltage V Saturation Voltage V

ISW= 1A, pin1,8 connected) -- 1.0 1.3 V

CE(SAT)

ISW= 1A, Id=50mA -- 0.45 0.7 V

CE(SAT)

DC current gain HFE ISW = 1A, Vce= 0.5V -- 75 -- -Collector off-state current I

Vce= 40V -- 0.01 100 uA

C(OFF)

Comparator

Threshold Voltae V

REF

1.225 1.25 1.275 V

Line regulation RegLine VCC = 3V ~ 40V -- -- 6 mV

Total device

= 5V ~ 40V, CT = 1nF,

Supply Current ICC

pin7=Vcc, pin5>Vth, pin2=Gnd, remaining pins

-- 3 5 mA

open

Note: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient

temperature as possible

2. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (<=300mA) and high driver currents (>=30mA), it may take up to 2uS for it to come out of saturation. This condition will shorten the off time at frequencies >= 30KHz, and is magnified at high temperature. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended:

Forced Bata of output switch: Ic output / (Ic driver – 7mA*) >= 10

* The 100ohm resistor in the emitter of the driver divide requires about 7mA before the output switch conducts.

TS34063 2-8 2003/12 rev. C

Circuit Description

TS34063 3-8 2003/12 rev. C

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