HA17451 Hitachi Semiconductor, HA17451 Datasheet

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HA17451

Manufacturer Part Number
HA17451
Description
Switching Regulator Controllers for DC/DC Converters
Manufacturer
Hitachi Semiconductor
Datasheet

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Part Number:
HA17451AFP
Manufacturer:
HITACHI/日立
Quantity:
20 000
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HA17451AFP-EL
Manufacturer:
OMRON
Quantity:
1 000
Part Number:
HA17451AFP-EL
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HITACHI/日立
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HA17451FP
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Part Number:
HA17451P
Manufacturer:
PHI
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1 542
Part Number:
HA17451P
Manufacturer:
HITACHI/日立
Quantity:
20 000
Description
The HA17451 is a dual-channel switching regulator controller IC. Each channel contains the basic circuits
for controlling a PWM-type switching-regulator power supply. Both channels are integrated onto the same
chip. Both channels can be completely synchronized, using the same oscillator output waveform. Each
channel can provide output voltages for step-up, step-down, inverting, and other converter topologies.
These controllers operate at voltages from 3.3 V to 40 V, making them suitable for a wide range of
applications. They are ideal for chopper-type DC/DC converters. They are similar to the TL1451, but note
that the HA17451A differs from the TL1451A.
Functions
Low-dropout 2.5V voltage reference
Undervoltage lockout
Triangle-wave oscillator
Adjustable dead-time control
Error amplifier
Output driver (open-collector transistor type)
PWM comparator
Switching Regulator Controllers for DC/DC Converters
HA17451AP/HA17451AFP

Related parts for HA17451

HA17451 Summary of contents

Page 1

... Switching Regulator Controllers for DC/DC Converters Description The HA17451 is a dual-channel switching regulator controller IC. Each channel contains the basic circuits for controlling a PWM-type switching-regulator power supply. Both channels are integrated onto the same chip. Both channels can be completely synchronized, using the same oscillator output waveform. Each channel can provide output voltages for step-up, step-down, inverting, and other converter topologies ...

Page 2

... Undervoltage lockout circuit High threshold voltage: 3.15 V (typ) Low threshold voltage: 2.98 V (typ) Low current drain: 1.5 mA (typ) Operates at wide range of oscillator frequencies: f Dead time adjustable through full duty cycle range Surface-mount package (SOP16) for saving space (HA17451AFP) Ordering Information Type Name HA17451AP HA17451AFP 2 ...

Page 3

... GND 8 (Top view) Functions Timing capacitor Timing resistor Non-inverting input of error amp Inverting input of error amp Output of error amp Dead time control Output Ground Input voltage Short circuit protection Reference voltage output HA17451AP/HA17451AFP 16 Vref S.C.P 15 NON. INV. 14 INPUT2 INV. 13 INPUT2 FEED 12 BACK2 D.T.C2 ...

Page 4

... HA17451AP/HA17451AFP Block Diagram 4 ...

Page 5

... Power supply voltage Error amplifier input voltage Collector output voltage Collector output current Power dissipation Operating temperature Storage temperature Note: This value applies to the HA17451AP at ambient temperatures Derate by8.3 mW/ C above that point. Feedback line Also used as positive feedback route + + – ...

Page 6

... HA17451AP/HA17451AFP Electrical Characteristics ( Reference Section Item Output voltage Voltage drop Line regulation Load regulation Maximum output current Reverse voltage state minimum current Undervoltage Lockout Protection Section Item High level threshold Low level threshold Hysteresis width Reset voltage Protection Section ...

Page 7

... Vref OM+ 0.15 V OM- I 0.5 1.6 OM OM- Symbol Min Typ I (1) Leak I (2) Leak Vsat 1.2 HA17451AP/HA17451AFP = 200 kHz) (cont) OSC Max Unit Test Conditions 2. kHz OSC Duty cycle = kHz OSC Duty cycle = 100% Max Unit Test Conditions (pin 5, 12) = 1.25 V ...

Page 8

... Vt100 1.20 1.45 Isink 0.5 1.6 Isource 70 Symbol Min Typ Iccs 1.5 Icca 1.9 C 330 HA17451A Output 2 Max Unit Test Conditions 2. kHz OSC Duty cycle = kHz OSC Duty cycle = 100 (pin 5, 12) = 1.25 V ...

Page 9

... 33000 0.8 kHz OSC 100 1.75 2.00 2.25 1.00 (V) D.T.C HA17451AP/HA17451AFP OUT Ambient Temperature 100 Frequency (Hz) Output Transistor “ON” Duty vs. Dead Time Input Voltage (2) V ...

Page 10

... (mA) Oscillator Frequency vs. Timing Resistance 300 100 Timing Resistance (k ) Undervoltage Lockout Threshold Voltage vs. Ambient Temperature 4.0 1615 14131211 10 9 HA17451A 3.5 Vth 3.0 VtI 2.5 2.0 – Ambient Temperature 100 75 85 ...

Page 11

... Timing Waveforms • Internal waveform timing diagram HA17451AP/HA17451AFP 11 ...

Page 12

... C6 0.47 Step-up output circuit (using transistor switching element 470 k C3 470 2.2 HA17451A 470 2000 p C6 R10 63 k 470 k R9 Step-down output circuit Switching transistor Q1 2SB857 V ...

Page 13

... Feedback voltage resistors Absolute value of negative output voltage OUT 18 A: Minimum current with negative voltage at reference voltage pin OUT INV. INPUT (min) OR HA17451AP/HA17451AFP V IN Negative DC output – + Iref I (min –0 –V OUT Vref 13 ...

Page 14

... HA17451AP/HA17451AFP Package Dimensions 16 1 1.11 Max 2.54 0. 1.27 *0.42 0.40 *Dimension including the plating thickness Base material dimension 14 19.20 20.00 Max 9 8 1.3 0.48 0.10 Hitachi Code JEDEC EIAJ Mass (reference value) 10.06 10.5 Max 9 8 0.80 Max 0.08 0.06 0.15 M 0.12 Hitachi Code JEDEC EIAJ Mass (reference value) Unit: mm 7.62 + 0.13 0.25 – 0.05 0 – 15 DP-16 Conforms Conforms 1.07 g Unit 0.20 7.80 – 0.30 1.15 0 – 8 ...

Page 15

... Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 HA17451AP/HA17451AFP Hitachi Asia (Hong Kong) Ltd. Hitachi Asia Pte. Ltd. Group III (Electronic Components) 16 Collyer Quay #20-00 7/F., North Tower, World Finance Centre, Hitachi Tower ...

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