L6598
HIGH VOLTAGE RESONANT CONTROLLER
1
■
■
■
FEATURES
HIGH VOLTAGE RAIL UP TO 600V
dV/dt IMMUNITY
±50V/ns
IN FULL
TEMPERATURE RANGE
DRIVER CURRENT CAPABILITY:
250mA SOURCE
450mA SINK
SWITCHING TIMES 80/40ns RISE/FALL WITH
1nF LOAD
CMOS SHUT DOWN INPUT
UNDER VOLTAGE LOCK OUT
SOFT START FREQUENCY SHIFTING
TIMING
SENSE OP AMP FOR CLOSED LOOP
CONTROL OR PROTECTION FEATURES
HIGH ACCURACY CURRENT CONTROLLED
OSCILLATOR
INTEGRATED BOOTSTRAP DIODE
CLAMPING ON Vs
SO16, DIP16 PACKAGES
Figure 1. Packages
DIP-16
SO-16N
Table 1. Order Codes
Part Number
L6598
L6598D
L6598D013TR
Package
DIP-16
SO-16N
Tape & Reel
■
■
■
■
■
■
■
■
■
2
DESCRIPTION
The device is manufactured with the BCD OFF LINE
Figure 2. Block Diagram
V
S
OP AMP
12
+
-
UV
DETECTION
technology, able to ensure voltage ratings up to
600V, making it perfectly suited for AC/DC Adapters
and wherever a Resonant Topology can be benefi-
cial. The device is intended to drive two Power MOS,
in the classical Half Bridge Topology. A dedicated
Timing Section allows the designer to set Soft Start
Time, Soft Start and Minimum Frequency. An Error
Amplifier, together with the two Enable inputs, are
made available. In addition, the integrated Bootstrap
Diode and the Zener Clamping on low voltage sup-
ply, reduces to a minimum the external parts needed
in the applications.
H.V.
16
V
BOOT
OPOUT
OPIN-
OPIN+
5
6
7
BOOTSTRAP
DRIVER
HVG
DRIVER
15
14
HVG
C
BOOT
LOAD
OUT
Ifmin
V
REF
DEAD
TIME
4
Rfmin
LVG DRIVER
Ifstart
V
REF
+
2
Rfstart
CONTROL
LOGIC
Iss
3
Cf
VCO
1
Css
D98IN887A
DRIVING
LOGIC
LEVEL
SHIFTER
Vs
11
10
GND
8
LVG
Vthe1
-
+
-
Vthe2
EN1
9
EN2
June 2004
1/17
STMICROELECTRONICS [ STMICROELECTRONICS ]
