UC1868L datasheet, PDF - EEWORLD Datasheet

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UC1868L: DescriptionSwitching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CQCC20,; CategoryPower/power management The power supply circuit; File Size459KB，8 Pages; ManufacturerUnitrode Corporation

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UC1868L Overview

Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CQCC20,

UC1868L Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
package instruction	QCCN, LCC20,.35SQ
Reach Compliance Code	unknown
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	CURRENT-MODE
Control Technology	RESONANT CONTROL
Maximum input voltage	20 V
Minimum input voltage	12 V
Nominal input voltage	12 V
JESD-30 code	S-CQCC-N20
JESD-609 code	e0
Number of functions	1
Number of terminals	20
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Maximum output current	1.5 A
Package body material	CERAMIC, METAL-SEALED COFIRED
encapsulated code	QCCN
Encapsulate equivalent code	LCC20,.35SQ
Package shape	SQUARE
Package form	CHIP CARRIER
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
Maximum supply current (Isup)	32 mA
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	1000 kHz
technology	BIPOLAR
Temperature level	MILITARY
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	NO LEAD
Terminal pitch	1.27 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
Base Number Matches	1

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UC1861-1868

UC2861-2868

UC3861-3868

Resonant-Mode Power Supply Controllers

FEATURES

DESCRIPTION

•

Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Cur-

or Zero Voltage Switched (ZVS)

rent Switched and Zero Voltage Switched quasi-resonant converters. Dif-

Quasi-Resonant Converters

ferences between members of this device family result from the various

combinations of UVLO thresholds and output options. Additionally, the

•

Zero-Crossing Terminated One-Shot

one-shot pulse steering logic is configured to program either on-time for

Timer

ZCS systems (UC1865-1868), or off-time for ZVS applications (UC1861-

•

Precision 1%, Soft-Started 5V

1864).

Reference

The primary control blocks implemented include an error amplifier to com-

•

Programmable Restart Delay

pensate the overall system loop and to drive a voltage controlled oscillator

Following Fault

(VCO), featuring programmable minimum and maximum frequencies. Trig-

gered by the VCO, the one-shot generates pulses of a programmed maxi-

•

Voltage-Controlled Oscillator (VCO)

mum width, which can be modulated by the Zero Detection comparator.

with Programmable Minimum and

Maximum Frequencies from 10kHz to This circuit facilitates “true” zero current or voltage switching over various

line, load, and temperature changes, and is also able to accommodate the

1MHz

resonant components' initial tolerances.

•

Low Start-Up Current (150µA typical)

Under-Voltage Lockout is incorporated to facilitate safe starts upon

•

Dual 1 Amp Peak FET Drivers

power-up. The supply current during the under-voltage lockout period is

typically less than 150µA, and the outputs are actively forced to the low

•

UVLO Option for Off-Line or DC/DC

state.

(continued)

Applications

Device

UVLO

Outputs

“Fixed”

1861

16.5/10.5

Alternating

Off Time

1862

16.5/10.5

Parallel

Off Time

1863

36014

Alternating

Off Time

1864

36014

Parallel

Off Time

1865

16.5/10.5

Alternating

On Time

1866

16.5/10.5

Parallel

On Time

1867

36014

Alternating

On Time

1868

36014

Parallel

On Time

BLOCK DIAGRAM

Pin numbers refer to the J and N packages.

UDG-92018

10/98

UC1868L Related Products

	UC1868L	UC1868J	UC1861L	UC1862L	UC1866J	UC1862J	UC1866L
Description	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CQCC20,	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CDIP16,	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CQCC20,	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CQCC20,	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CDIP16,	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CDIP16,	Switching Controller, Current-mode, 1.5A, 1000kHz Switching Freq-Max, BIPolar, CQCC20,
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible
package instruction	QCCN, LCC20,.35SQ	DIP, DIP16,.3	QCCN, LCC20,.35SQ	QCCN, LCC20,.35SQ	DIP, DIP16,.3	DIP, DIP16,.3	QCCN, LCC20,.35SQ
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown	unknown
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Control Technology	RESONANT CONTROL	RESONANT CONTROL	RESONANT CONTROL	RESONANT CONTROL	RESONANT CONTROL	RESONANT CONTROL	RESONANT CONTROL
Maximum input voltage	20 V	20 V	20 V	20 V	20 V	20 V	20 V
Minimum input voltage	12 V	12 V	12 V	12 V	12 V	12 V	12 V
Nominal input voltage	12 V	12 V	12 V	12 V	12 V	12 V	12 V
JESD-30 code	S-CQCC-N20	R-CDIP-T16	S-CQCC-N20	S-CQCC-N20	R-CDIP-T16	R-CDIP-T16	S-CQCC-N20
JESD-609 code	e0	e0	e0	e0	e0	e0	e0
Number of functions	1	1	1	1	1	1	1
Number of terminals	20	16	20	20	16	16	20
Maximum operating temperature	125 °C	125 °C	125 °C	125 °C	125 °C	125 °C	125 °C
Minimum operating temperature	-55 °C	-55 °C	-55 °C	-55 °C	-55 °C	-55 °C	-55 °C
Maximum output current	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A
Package body material	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED
encapsulated code	QCCN	DIP	QCCN	QCCN	DIP	DIP	QCCN
Encapsulate equivalent code	LCC20,.35SQ	DIP16,.3	LCC20,.35SQ	LCC20,.35SQ	DIP16,.3	DIP16,.3	LCC20,.35SQ
Package shape	SQUARE	RECTANGULAR	SQUARE	SQUARE	RECTANGULAR	RECTANGULAR	SQUARE
Package form	CHIP CARRIER	IN-LINE	CHIP CARRIER	CHIP CARRIER	IN-LINE	IN-LINE	CHIP CARRIER
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum supply current (Isup)	32 mA	32 mA	32 mA	32 mA	32 mA	32 mA	32 mA
surface mount	YES	NO	YES	YES	NO	NO	YES
Switch configuration	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL
Maximum switching frequency	1000 kHz	1000 kHz	1000 kHz	1000 kHz	1000 kHz	1000 kHz	1000 kHz
technology	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR
Temperature level	MILITARY	MILITARY	MILITARY	MILITARY	MILITARY	MILITARY	MILITARY
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)
Terminal form	NO LEAD	THROUGH-HOLE	NO LEAD	NO LEAD	THROUGH-HOLE	THROUGH-HOLE	NO LEAD
Terminal pitch	1.27 mm	2.54 mm	1.27 mm	1.27 mm	2.54 mm	2.54 mm	1.27 mm
Terminal location	QUAD	DUAL	QUAD	QUAD	DUAL	DUAL	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
Maker	-	-	Unitrode Corporation	Unitrode Corporation	Unitrode Corporation	Unitrode Corporation	Unitrode Corporation

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