PQ1CX12H2ZP Datasheet, PDF (1/1 Pages) Sharp Electrionic Components – Boot Strap System Chopper Regulator

Under
Development
Boot Strap System Chopper Regulator
Features
Outline Dimensions
[PQ1CX12H2ZP]
• High efficiency:TYP 87 %
(Compare to conventional model:5 % up)
• Low dissipation current :IQS=MAX 7mA
(Compare to conventional model:56% down)
• Compact package:SOP8 -pin(Outline dimension:5.2 ×6.2×1.5 mm)
Compare to SC -63 package (Mounting area):49 % down
Compare to TO -263 package (Mounting area):77 % down
Expansion of Chopper Regulator
System
Model No.
Efficiency
SW current(MAX)
Input voltage
Package
Outline dimension
General purpose type
Boot strap system
PQ1CY1032ZP/ZZ
PQ1CX12H2ZP
TYP 82% (12V → 5V,2A)
TYP 87% (12V → 5V,2A)
TYP 75% (5V →3.3V,2A)
TYP 85% (5V →3.3V,2A)
3.5 A
High efficiency
2.5 A
4.5 to 40 V Compact package 4.5 to 20 V
TO-263type 5 -pin
SOP8 -pin
10.6×13.7×3.5 mm
5.2×6.2×1.5 mm
Specifications
Parameter
Symbol Characteristics
Conditions
Input voltage
VIN
MAX 20 V
Output saturation voltage
VSAT
TYP 0.3 V ISW =2.0 A
Switching current
ISW
MAX 2.5 A
Output OFF -state dissipation current IQS
Stand -by current
ISD
MAX 7 mA VIN=20 V
MAX 400 µA VIN=20 V
Reference voltage
Vref
TYP 1.26 V
Oscillation frequency
Efficiency
Operating temperature
fOSC TYP 150 kHz
η
TYP 87% V_IN=12V,V _O=5V,I _O=2A
Topr -30 to +85 °C
5.2
8 7 65
1 VIN
2 VB
3 NC
4 ON/OFF
5 Vadj
6 COM
7 COM
8 ^VO
12 34
Unit:mm
S mark
1.25
Line-up of Chopper Regulator
Step down output
/ Reverse output
Package SW current Oscillation frequency
TO-220 0.8A
300kHz PQ1CG38M2FZ/RZ
1.5A
100kHz PQ1CG21H2FZ/RZ
300kHz PQ1CG41H2FZ/RZ
3.5A
70kHz
150kHz
PQ1CG2032FZ/RZ
PQ1CG3032FZ/RZ
TO-263 3.5A
150kHz PQ1CY1032ZP/ZZ
SC-63
0.8A
1.5A
300kHz
100kHz
300kHz
PQ1CZ38M2ZP/ZZ
PQ1CZ21H2ZP/ZZ
PQ1CZ41H2ZP/ZZ
SOP8 -pin 2.5A
150kHz PPQQ11CCXX1122HH22ZZPP
■ Block Diagram
VIN
Drive
VB
Circuit
Voltage
regulator
ON/OFF
circuit
Over
current
detection
circuit
Over
Heat
Detection
circuit
Comparator
+
-
Soft
Start
Q
F/F ^R
S
Oscill
ator
-
+
AMP
V ref
fo Conversion
circuit
COM
■ Application Circuit
V IN =5V
V IN
VC
(ON/OFF)
C IN
Boot strap
VB condenser
Chopper
regulator
Vo
Oadj
COM
D
GND
L
R2
R1
■ Feature of Bootstrap Method Chopper Regulator
Bootstrap capacitor is installed to supply higher controlled vol tage than input voltage to
Vo
switching transistor inside.
The higher efficiency is obtained due to the switching transisto r’s saturated voltage become
low by higher controlled voltage than supplied input voltage
ON/OFF
Oadj
Vo=3.3V
Io=2A
Conventional (general purpose)
Supply from same voltage
as input voltage
ï½¥Reduction of
switching loss
ï½¥High efficiency
Bootstrap method
To supply from higher voltage than
input voltage Charged to bootstrap capacitor
VIN
driver
VCE
VBE
VO
Output salutation voltage:
Large : over 1V
Driver power supply and output transistor
current are supplied from the same power
supply.
C
VIN
driver
VCE
VO
Output saturation voltage Low : 0.3Ｖ
Driver power and output transistor current is
supplied from the separate power supply
V OUT
CO
GND
Output salutation voltage:
Large (VBE +VCE = over 1V)
Output saturation voltage small
(V_CE=0.3)
・High Efficiency 82% against conventional model
---> The method 87%(at V_IN=12V-Æ Vo=5V)
Drastic improvement of efficiencyesp in dropper application below 5V
・Efficiency improvement at low input
Conventional efficiency 75%-Æ 85% (V_IN=5V Æ VO =3.3V)