ELECTRICAL CHARACTERICS

(VIN = 12V，TA＝－40°C to +85°C，Typical values are at TA＝+25°C, unless otherwise noted)

Parameters

Symbol

Test Conditions

Min

Typ

Max

Unit

Input Voltage Range

VIN

4

28

V

Switching Frequency

1

MHz

Operating Current

395

515

635

uA

Inductor Current Sense Comparator

Sense Threshold High

120

150

180

mV

Sense Threshold Low

96

120

144

mV

Propagation Delay to

Output High

0.07V

82

ns

Propagation Delay to

Output Low

82

ns

CSN Input Current

1

uA

FB Pin

FB Charge Termination

Threshold

FB voltage rises

1.19

1.205

1.22

V

FB Recharge Threshold

FB voltage falls

1.13

1.155

1.18

V

FB Current

－

100

＋

100

nA

DRV Pin

Source Current

0.5

A

Sink Current

1

A

Output Voltage High

VCC－0.5

V

Output Voltage Low

0.5

V

VCC Pin

Regulation Voltage

VCC

VIN＝5.5V to 30V

4.5

5.5

V

Load Regulation

5

ohm

Line Regulation

6

mV

PSRR

PSRR

－

35

dB

Start Time

VCC＝0 to 4.5V

350

us

Detailed Description

The

HM4033 is a step up battery charger controller IC which operates from an input voltage of 4V to 28V. The

HM4033includes an on-chip reference voltage, +5V voltage regulator, inductor current sensing, battery voltage

monitoring and N-channel MOSFET driving blocks, etc, which makes the

HM4033 easy to be used with few

external components.

The

HM4033 enters charge mode on power up, the external N-channel MOSFET is turned on, inductor current

rises. When the inductor current rises to the upper limit, the N-channel MOSFET is turned off, and inductor

current begins to fall, the energy stored in inductor is transferred to the battery. When inductor current falls to the

HM4033