NE5562 Datasheet, PDF (1/29 Pages) NXP Semiconductors – Switched-mode power supply control circuit

Philips Semiconductors
Switched-mode power supply control circuit
Product specification
NE/SE5562
DESCRIPTION
The NE/SE5562 is a single-output control circuit for switched-mode
power supplies. This single monolithic IC contains all control and
protection features needed for full-featured switched-mode power
supplies.
The 100mA source/sink output is designed to drive power FETs
directly. The associated output logic is designed to prevent double
pulsing or cross-conduction current spiking on the output.
All of the control and protect features work cycle-by-cycle up to the
maximum operating frequency of 600kHz.
For ease of interface, all digital inputs are TTL or CMOS compatible.
The NE5562 is supplied in 20-pin glass/ceramic (Cerdip), plastic
DIP, and plastic SO packages. The NE grade part is characterized
and guaranteed over the commercial ambient temperature range of
0°C to +70°C and junction temperature range of 0°C to +85°C. The
SE5562 is supplied in the glass/ceramic (Cerdip) package. The SE
grade part is characterized and guaranteed over the ambient
temperature range of -55 to +125°C and junction temperature range
of -55 to +135°C.
FEATURES
• Stabilized power supply
• Temperature-compensated reference source
• Sawtooth generator
• Pulse width modulator
• Remote on/off switching
• Current limiting (2 levels)
PIN CONFIGURATION
D, F, N Packages
FEED FORWARD ¹
C_T ²
R_T 3
EXTERNAL MOD IN ⁴
DUTY CYCLE CONTROL ⁵
REMOTE ON/OFF 6
V_I ⁷
FEEDBACK VOLTAGE 8
V_Z ⁹
ERROR AMP OUT 10
20 _GROUND
19 _OUTPUT
18 DEMAG OVERVOLT IN
17 _VS
16 _{C DELAY}
15 OUT INVERT CONTROL
14 CURRENT SENSE
13 ^{AUX COMP HYSTERESIS}
12 AUX COMP INPUT
11 EXTERNAL SYNC IN
TOP VIEW
Figure 1. Pin Configuration
SL00388
• Auxiliary comparator, with adjustable hysteresis
• Loop fault protection
• Demagnetization/overvoltage protection
• Duty cycle adjust and clamp
• Feed-forward control
• External synchronization
• Total shutdown after adjustable number of overcurrent faults
• Soft-start
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Small Outline (SO) Package
20-Pin Plastic Dual In-Line Package (DIP)
20-Pin Ceramic Dual In-Line Package (CERDIP)
TEMPERATURE RANGE
0 to +70°C
0 to +70°C
-55°C to +125°C
ORDER CODE
NE5562D
NE5562N
SE5562F
DWG #
1021B
SOT146-1
SOT146-1
1994 Aug 31
1
853-0811 13721