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PDF L6668 Data sheet ( Hoja de datos )

Número de pieza L6668
Descripción SMART PRIMARY CONTROLLER
Fabricantes STMicroelectronics　
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No Preview Available ! L6668 Hoja de datos, Descripción, Manual

L6668
SMART PRIMARY CONTROLLER
1 General Features
■ MULTIPOWER BCD TECHNOLOGY
■ LOAD-DEPENDENT CURRENT-MODE CON-
TROL: FIXED-FREQUENCY (HEAVY LOAD),
FREQUENCY FOLDBACK (LIGHT LOAD),
BURST-MODE (NO-LOAD)
■ ON-BOARD HIGH-VOLTAGE START-UP
w■wwIM.DPaRtaOShVeEeDt4US.cToAmNDBY FUNCTION
■ LOW QUIESCENT CURRENT (< 2 mA)
■ SLOPE COMPENSATION
■ PULSE-BY-PULSE & HICCUP-MODE OCP
■ INTERFACE WITH PFC CONTROLLER
■ DISABLE FUNCTION (ON/OFF CONTROL)
■ LATCHED DISABLE FOR OVP/OTP FUNC-
TION
■ PROGRAMMABLE SOFT-START
■ 2% PRECISION REFERENCE VOLTAGE EX-
TERNALLY AVAILABLE
■ ±800 mA TOTEM POLE GATE DRIVER WITH
INTERNAL CLAMP AND UVLO PULL-DOWN
■ BLUE ANGEL, ENERGY STAR, EU CODE OF
CONDUCT COMPLIANT
Figure 2. Block Diagram
Figure 1. Package
SO-16 (Narrow)
Table 1. Order Codes
Part Number
L6668
L6668TR
Package
SO-16
SO-16 in Tape & Reel
■ SO16 PACKAGE ECOPACK®
1.1 APPLICATIONS
■ HI-END AC-DC ADAPTERS/CHARGERS FOR
NOTEBOOKS.
■ LCD/CRT MONITORS, LCD/CRT TV
■ DIGITAL CONSUMER
16
RCT
S-COMP
15
SLOPE
COMP.
HV
1
TIMING
CLK
VCC
5
25V
HV generator ON/OFF
and UVLO management
VREG
Vref
DIS
N.C.
7
2.2V
+
-
6
ISEN
12 HICCUP
+
-
1.5V
PFC_STOP
14
R
SQ
Vcc_OK
DIS
BLANKING
S
R
SQ
+
PWM
-
OCP
-
R
Vcc_OK
DIS
HYST. CTRL
Q
VREG
+ 0.4mA
-
+
DIS 2.2/2.7V
OCP
0.8V
9
11R
4R
SOFT-START
11
10
15V
STANDBY
8
VREF
4
OUT
3
GND
13
ST-BY
SKIPADJ
SS COMP
January 2006
Rev. 4
1/23

1 page




L6668 pdf
L6668
Table 5. Electrical Characteristcs (continued)
(Tj = 0 to 105°C, Vcc=15V, Co=1nF; RT =13.3k , CT =1nF; unless otherwise specified)
Symbol
Parameter
REFERENCE VOLTAGE
VREF Output voltage
VREF Total variation
IREF Short circuit current
Sink capability in UVLO
PWM CONTROL
VCOMPH Maximum level
ICOMP Max. source current
wwwR.CDOaMtPaSheDeyt4nUa.mcoicmresistance
Dmax Maximum duty cycle
Dmin Minimum duty cycle
CURRENT SENSE COMPARATOR
IISEN Input Bias Current
tLEB Leading Edge Blanking
td(H-L) Delay to Output
Gain
VISENx Maximum signal
VISENdis Hiccup-mode OCP level
STANDBY FUNCTION
Vdrop VCOMP - VSTBY
Vth Threshold on VCOMP
Hysteresis
LATCHED DISABLE FUNCTION
IDIS Input Bias Current
Vth Disable threshold
OSCILLATOR
fsw Oscillation Frequency
Vpk Oscillator peak voltage
Vvy Oscillator valley voltage
SLOPE COMPENSATION
S-COMPpk Ramp peak
S-COMPvy Ramp starting value
Ramp voltage
Source capability
SOFT-START
ISSC Charge current
Test Condition
Min. Typ.
(2) Tj = 25 °C; IREF = 1 mA
Vcc= 9.4 to 22 V,
IREF = 1 to 5 mA
VREF = 0
Vcc = 6V; Isink = 0.5 mA
4.925
4.8
5
10
0.2
ICOMP =0
VCOMP = 1 V
VCOMP = 2 to 4 V
VCOMP = 5 V
VCOMP = 1 V
VISEN = 0
After gate drive low-to-high
transition
5.5
320 400
22
70
160 225
VCOMP = 5 V
(2)
3.56
0.725
1.35
3.75
0.8
1.5
ISTBY = 0.8 mA, VCOMP<3V
(2) Voltage falling
35
3
50
VDIS = 0 to Vth
(2) voltage rising
2.1 2.2
Tj = 25°C, VCOMP = 5 V
Vcc = 9.4 to 22V, VCOMP = 5 V
(2)
(2)
95 100
93 100
2.85 3
0.8 0.95
RS-COMP = 3 kΩ to GND,
OUT pin high, VCOMP = 5V
RS-COMP = 3 kΩ to GND,
OUT pin high
OUT pin low
VS-COMP = VS-COMPpk
1.6 1.75
0.15 0.35
0
0.8
Tj = 25 °C
14 20
Max.
5.075
5.13
30
0.5
480
75
0
-1
290
100
3.94
0.875
1.65
-1
2.3
105
107
3.15
1.1
1.9
0.55
26
Unit
V
V
mA
V
V
µA
kΩ
%
%
µA
ns
ns
V/V
V
V
mV
V
mV
µA
V
kHz
kHz
V
V
V
V
mA
µA
5/23

5 Page





L6668 arduino
Figure 29. S-COMP ramp vs. Tj
Vpin15
2.0
(V)
1.5
Peak
Vcc = 15 V
RS-SCOMP = 3 kΩ
1.0
0.5
Valley
0.0
-50 0
www.DataSheet4U.com
50
Tj (°C)
100
150
Figure 30. UVLO saturation vs. Tj
Vpin4
1
(V)
0.9
Vcc = 0 V
0.8
0.7
0.6
0.5
-50
0 50 100 150
Tj (°C)
Figure 31. Gate-drive clamp vs. Tj
Vpin4 clamp
13
(V)
12.8
Vcc = 20 V
12.6
12.4
12.2
12
-50
0 50 100 150
Tj (°C)
L6668
Figure 32. Gate-drive output low saturation
Vpin4 [V]
5
4
Tj = 25 °C
Vcc = 12 V
SINK
3
2
1
0
0 200 400 600 800 1,000 1,200
IGD[mA]
Figure 33. Gate-drive output high saturation
Vpin4 [V]
Vcc - 2.0
Vcc - 3.0
Vcc - 4.0
Vcc - 5.0
Vcc - 6.0
Tj = 25 °C
Vcc = 12 V
SOURCE
0 200 400 600 800 1,000
IGD[mA]
11/23

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