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PQ1CX12H2ZP Datasheet

Boot Strap System Chopper Regulator

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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
MAX 7 mA VIN=20 V
Stand -by current
Reference voltage
ISD MAX 400 µA VIN=20 V
Vref TYP 1.26 V
Oscillation frequency
fOSC TYP 150 kHz
Efficiency
Operating temperature
η TYP 87% VIN=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
1.25
Unit:mm
S mark
Line-up of Chopper Regulator
Step down output
/ Reverse output
Package SW current
TO -220
0.8A
1.5A
Oscillation frequency
300kHz PQ1CG38M2FZ/RZ
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
COM
Vo
Oadj
GND
D
L
R2
R1
Vo
ON/OFF
Oadj
Vo=3.3V
Io=2A
V OUT
CO
GND
Feature of Bootstrap Method Chopper Regulator
Bootstrap capacitor is installed to supply higher controlled vol tage than input voltage to
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
Conventional (general purpose)
Supply from same voltage
as input voltage
Reduction of
switching loss
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 : 0.3
Driver power and output transistor current is
supplied from the separate power supply
Output salutation voltage:
Large (VBE +VCE = over 1V)
Output saturation voltage small
(VCE=0.3)
High Efficiency 82% against conventional model
---> The method 87%(at VIN=12V-Æ Vo=5V)
Drastic improvement of efficiencyesp in dropper application below 5V
Efficiency improvement at low input
Conventional efficiency 75%-Æ 85% (VIN=5V Æ VO =3.3V)


Part Number PQ1CX12H2ZP
Description Boot Strap System Chopper Regulator
Maker Sharp Electrionic
Total Page 1 Pages
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